Antibody molecule-drug conjugates and uses thereof

ABSTRACT

Antibody molecule-drug conjugates (ADCs) that specifically bind to lipopolysaccharides (LPS) are disclosed. The antibody molecule-drug conjugates can be used to treat, prevent, and/or diagnose bacterial infections and related disorders.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a divisional application of U.S. application Ser. No. 15/348,436, filed Nov. 10, 2016, which claims the benefit of U.S. Provisional Application No. 62/253,345, filed Nov. 10, 2015, and U.S. Provisional Application No. 62/375,800, filed Aug. 16, 2016. The contents of the aforementioned applications are hereby incorporated by reference in their entirety.

SEQUENCE LISTING

The instant application contains a Sequence Listing which has been submitted electronically in ASCII format and is hereby incorporated by reference in its entirety. Said ASCII copy, created on Nov. 10, 2016, is named P2029-7003WO_SL.txt and is 85,211 bytes in size.

BACKGROUND

A wide range of bacteria can cause infections that lead to mild to serious illnesses. Bacterial infections are often treated by antibiotics. However, the emergence of antibiotic-resistant bacterial strains has complicated the treatment of infections. Antibiotic-resistant infections often result in greater disability and death compared with infections that are easily treatable with antibiotics. According to the Centers for Disease Control and Prevention (CDC), each year in the United States, at least 2 million people acquire serious infections with bacteria that are resistant to one or more of the antibiotics designed to treat those infections. At least 23,000 people die each year as a direct result of these antibiotic-resistant infections. These estimates were based on conservative assumptions and are likely minimum estimates. More patients may die from other conditions that were complicated by a bacterial infection. When first-line and then second-line antibiotic treatment options are limited by resistance or are unavailable, healthcare providers are forced to use antibiotics that may be more toxic to the patient and frequently more expensive and less effective. In many cases, antibiotic-resistant infections require prolonged or costlier treatments, extend hospital stays, and necessitate additional doctor visits and healthcare use.

The use of antibiotics is one of the most important factors leading to antibiotic resistance around the world. Antibiotics are among the most commonly prescribed drugs used in human medicine. However, according to CDC, up to 50% of all the antibiotics prescribed for people are not needed or are not optimally effective as prescribed. Antibiotics are also commonly used in food animals to prevent, control, and treat disease, and to promote the growth of food-producing animals. The resistant strains of bacteria may spread from person to person, or from the non-human sources in the environment, including food.

There is a need for developing new approaches for treating, preventing and diagnosing bacterial infections.

SUMMARY

This disclosure provides, at least in part, antibody molecules or antibody molecule-drug conjugates (ADC) that bind to bacteria, e.g., Gram-negative bacteria, e.g., lipopolysaccharides (LPS) on the outer membrane of Gram-negative bacteria, and that comprise functional and structural properties disclosed herein. In an embodiment, the antibody molecule or ADC binds to a core pentasaccharide region of the LPS. In an embodiment, the antibody molecule or ADC binds to, inhibits, and/or reduces the viability of, one or more bacteria, e.g., Gram-negative bacteria, of different genera, species, and/or subspecies. In an embodiment, the antibody molecule is selected from Table 1 or 8. In an embodiment, the ADC comprises an antibody molecule that is selected from Table 1 or 8. In an embodiment, the antibody molecule or ADC comprises one or more heavy chain variable regions and/or one or more light chain variable regions described in Table 1 or 8. In an embodiment, the antibody molecule or ADC comprises one or more heavy chain CDRs and/or one or more light chain CDRs described in Table 1 or 8. In an embodiment, the ADC comprises an antimicrobial peptide, e.g., an antimicrobial peptide described herein, e.g., in Tables 3 or 6A-6B, or in FIG. 4 or 15A-15B. While not wishing to be bound by theory, it is believed that in an embodiment, the conjugation of an antibody molecule with an antimicrobial peptide may improve one or more properties of the antibody molecule and/or antimicrobial peptide, e.g., improve the ability of an antimicrobial peptide to inhibit, or reduce the viability, of one or more bacteria, e.g., one or more Gram-negative bacteria, of different genera, species, and/or subspecies. Nucleic acid molecules encoding the antibody molecules, ADCs, or antimicrobial peptides, expression vectors, host cells, compositions (e.g., pharmaceutical compositions), kits, and methods for making the antibody molecules, ADCs, or antimicrobial peptides are also provided. The antibody molecules, ADCs, and antimicrobial peptides disclosed herein can be used (alone or in combination with other agents or therapeutic modalities) to treat, prevent and/or diagnose bacterial infections or related disorders, e.g., caused by or associated with Gram-negative bacteria.

Accordingly, in certain aspects, this disclosure provides an antibody molecule-drug conjugate (ADC), e.g., an ADC comprising an antibody molecule described herein and an antimicrobial peptide (e.g., an antimicrobial peptide described herein), having one or more (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, or all) of the following properties:

-   -   a) Binds to one or more (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, or         more) Gram-negative bacteria of different genera, species,         and/or subspecies (e.g., one or more bacteria from         Enterobacteriaceae (e.g., Klebsiella, Enterobacter, Shigella,         Escherichia, Salmonella, or Citrobacter, e.g., pan-resistant         Enterobacteriaceae), one or more bacteria from Pseudomonas, one         or more bacteria from Acinetobacter, or any combination thereof)         with high affinity, e.g., with a dissociation constant (K_(D))         of less than about 100 nM, typically about 10 nM, and more         typically, about 10-0.01 nM, about 5-0.01 nM, about 3-0.05 nM,         about 1-0.1 nM, or stronger, e.g., less than about 80, 70, 60,         50, 40, 30, 20, 10, 8, 6, 4, 3, 2, 1, 0.5, 0.2, 0.1, 0.05, or         0.01 nM,     -   b) Binds to lipopolysaccharide (LPS) with high affinity, e.g.,         with a dissociation constant (K_(D)) of less than about 100 nM,         typically about 10 nM, and more typically, about 10-0.01 nM,         about 5-0.01 nM, about 3-0.05 nM, about 1-0.1 nM, or stronger,         e.g., less than about 80, 70, 60, 50, 40, 30, 20, 10, 8, 6, 4,         3, 2, 1, 0.5, 0.2, 0.1, 0.05, or 0.01 nM,     -   c) Inhibits one or more (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, or         more) Gram-negative bacteria of different genera, species,         and/or subspecies (e.g., one or more Gram-negative bacteria         described herein), e.g., as determined by measuring the minimum         inhibitory concentration (MIC) of the ADC, e.g., by a method         described herein,     -   d) Inhibits one or more (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, or         more) Gram-negative bacteria of different genera, species,         and/or subspecies (e.g., one or more Gram-negative bacteria         described herein) with a lower MIC compared to the antimicrobial         peptide alone, e.g., at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 20,         30, 40, 50, 60, 70, 80, 90, 100, 200, 500, 1,000-fold lowered         MIC, e.g., on a molar basis, e.g., as measured by a method         described herein,     -   e) Reduces the viability of one or more (e.g., 2, 3, 4, 5, 6, 7,         8, 9, 10, or more) Gram-negative bacteria of different genera,         species, and/or subspecies (e.g., one or more Gram-negative         bacteria described herein), e.g., as determined by measuring the         minimum bactericidal concentration (MBC), e.g., by a method         described herein,     -   f) Reduces the viability of one or more (e.g., 2, 3, 4, 5, 6, 7,         8, 9, 10, or more) Gram-negative bacteria of different genera,         species, and/or subspecies (e.g., one or more Gram-negative         bacteria described herein) with a lower MBC compared to the         antimicrobial peptide alone, e.g., at least 2, 3, 4, 5, 6, 7, 8,         9, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 500, 1,000-fold         lowered MBC, e.g., on a molar basis, e.g., as measured by a         method described herein,     -   g) Displays an opsonophagocytic activity (OPA), e.g., determined         by an OPA assay, e.g., as described herein,     -   h) Binds specifically to an epitope on LPS, e.g., the same or         similar epitope as the epitope recognized by an antibody         molecule described in Table 1 or 8, e.g., mAb001 (e.g., a         humanized mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   i) Shows the same or similar binding affinity or specificity, or         both, as an antibody molecule described in Table 1 or 8, e.g.,         mAb001 (e.g., a humanized mAb001), A001-25, hWN01, hWNv1, 3E7,         3G1, 2C7, or 3D6,     -   j) Shows the same or similar binding affinity or specificity, or         both, as an ADC comprising an antibody molecule described in         Table 1 or 8, e.g., mAb001 (e.g., a humanized mAb001), A001-25,         hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   k) Shows the same or similar binding affinity or specificity, or         both, as an antibody molecule comprising a heavy chain variable         region and/or light chain variable region described in Table 1         or 8, e.g., a heavy chain variable region and/or light chain         variable region of mAb001 (e.g., a humanized mAb001), A001-25,         hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   l) Shows the same or similar binding affinity or specificity, or         both, as an ADC comprising a heavy chain variable region and/or         light chain variable region described in Table 1 or 8, e.g., a         heavy chain variable region and/or light chain variable region         of mAb001 (e.g., a humanized mAb001), A001-25, hWN01, hWNv1,         3E7, 3G1, 2C7, or 3D6,     -   m) Shows the same or similar binding affinity or specificity, or         both, as an antibody molecule comprising one or more (e.g., two         or three) heavy chain CDRs and/or one or more (e.g., two or         three) light chain CDRs described in Table 1 or 8, e.g., one or         more (e.g., two or three) heavy chain CDRs and/or one or more         (two or three) light chain CDRs of mAb001 (e.g., a humanized         mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   n) Shows the same or similar binding affinity or specificity, or         both, as an ADC comprising one or more (e.g., two or three)         heavy chain CDRs and/or one or more (e.g., two or three) light         chain CDRs described in Table 1 or 8, e.g., one or more (e.g.,         two or three) heavy chain CDRs and/or one or more (two or three)         light chain CDRs of mAb001 (e.g., a humanized mAb001), A001-25,         hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   o) Shows the same or similar binding affinity or specificity, or         both, as an antibody molecule comprising an amino acid sequence         shown in Table 1 or 8,     -   p) Shows the same or similar binding affinity or specificity, or         both, as an ADC comprising an amino acid sequence shown in Table         1 or 8,     -   q) Inhibits, e.g., competitively inhibits, the binding of a         second antibody molecule to a Gram-negative bacterium, LPS, or         both, wherein the second antibody molecule is an antibody         molecule chosen from Table 1 or 8, e.g., mAb001 (e.g., a         humanized mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   r) Inhibits, e.g., competitively inhibits, the binding of a         second ADC comprising a second antibody molecule to a         Gram-negative bacterium, LPS, or both, wherein the second         antibody molecule is an antibody molecule chosen from Table 1 or         8, e.g., mAb001 (e.g., a humanized mAb001), A001-25, hWN01,         hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   s) Binds the same or an overlapping epitope as a second antibody         molecule, wherein the second antibody molecule is an antibody         molecule chosen from Table 1 or 8, e.g., mAb001 (e.g., a         humanized mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   t) Binds the same or an overlapping epitope with a second ADC         comprising a second antibody molecule, wherein the second         antibody molecule is an antibody molecule chosen from Table 1 or         8, e.g., mAb001 (e.g., a humanized mAb001), A001-25, hWN01,         hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   u) Competes for binding with a second antibody molecule to a         Gram-negative bacterium, LPS, or both, wherein the second         antibody molecule is an antibody molecule chosen from Table 1 or         8, e.g., mAb001 (e.g., a humanized mAb001), A001-25, hWN01,         hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   v) Competes for binding with a second ADC comprising a second         ADC to a Gram-negative bacterium, LPS, or both, wherein the         second antibody molecule is an antibody molecule chosen from         Table 1 or 8, e.g., mAb001 (e.g., a humanized mAb001), A001-25,         hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   w) Has one or more biological properties of an antibody molecule         chosen from Table 1 or 8, e.g., mAb001 (e.g., a humanized         mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   x) Has one or more biological properties of an ADC comprising an         antibody molecule chosen from Table 1 or 8, e.g., mAb001 (e.g.,         a humanized mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or         3D6,     -   y) Has one or more pharmacokinetic properties of ADC comprising         an antibody molecule chosen from Table 1 or 8, e.g., mAb001         (e.g., a humanized mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1,         2C7, or 3D6,     -   z) Reduces the viability of Gram-negative bacteria from a first         genus, species, or subspecies (e.g., Pseudomonas) with high         selectivity, compared to the reduction of viability of         Gram-negative bacteria from a second genus, species, or         subspecies (e.g., E. coli, Klebsiella spp., or both), e.g., at         least at least 2, 5, 10, 20, 50, 100, 200, 500, or 1000 fold         more in % killing, e.g., as determined by a mixed microbial         killing assay described herein,     -   aa) Binds to one or more P. aeruginosa strains (e.g., one or         more P. aeruginosa strains described in Table 7) with high         affinity, e.g., with an avidity EC₅₀ of about 200 pM or less,         e.g., less than about 150 pM or less, about 120 pM or less,         about 100 pM or less, about 80 pM or less, about 60 pM or less,         or about 40 pM or less, e.g., between about 40 pM and about 120         pM, between about 50 pM and 110 pM, between about 60 pM and 100         pM, between about 40 pM and 80 pM, or between 80 pM and 120 pM,         or     -   bb) Inhibits one or more (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, or         more) Gram-negative bacteria of different genera, species,         and/or subspecies (e.g., one or more Gram-negative bacteria         described herein, e.g., P. aeruginosa) in vivo, e.g., at least         2, 5, 10, 20, 50, 100, 200, 500, 1000, or more fold reduction in         bacterial burden, e.g., as determined using an animal model,         e.g., a murine acute pneumonia model described herein.

Accordingly, in certain aspects, this disclosure provides an antibody molecule, e.g., an antibody molecule described herein, having one or more (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, or all) of the following properties:

-   -   a) Binds to one or more (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, or         more) Gram-negative bacteria of different genera, species,         and/or subspecies (e.g., one or more bacteria from         Enterobacteriaceae (e.g., Klebsiella, Enterobacter, Shigella,         Escherichia, Salmonella, or Citrobacter, e.g., pan-resistant         Enterobacteriaceae), one or more bacteria from Pseudomonas, one         or more bacteria from Acinetobacter, or any combination thereof)         with high affinity, e.g., with a dissociation constant (K_(D))         of less than about 100 nM, typically about 10 nM, and more         typically, about 10-0.01 nM, about 5-0.01 nM, about 3-0.05 nM,         about 1-0.1 nM, or stronger, e.g., less than about 80, 70, 60,         50, 40, 30, 20, 10, 8, 6, 4, 3, 2, 1, 0.5, 0.2, 0.1, 0.05, or         0.01 nM,     -   b) Binds to lipopolysaccharide (LPS) with high affinity, e.g.,         with a dissociation constant (K_(D)) of less than about 100 nM,         typically about 10 nM, and more typically, about 10-0.01 nM,         about 5-0.01 nM, about 3-0.05 nM, about 1-0.1 nM, or stronger,         e.g., less than about 80, 70, 60, 50, 40, 30, 20, 10, 8, 6, 4,         3, 2, 1, 0.5, 0.2, 0.1, 0.05, or 0.01 nM,     -   c) Displays an opsonophagocytosis activity (OPA), e.g.,         determined by an OPA assay, e.g., as described herein,     -   d) Binds specifically to an epitope on LPS, e.g., the same or         similar epitope as the epitope recognized by an antibody         molecule described in Table 1 or 8, e.g., mAb001 (e.g., a         humanized mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   e) Shows the same or similar binding affinity or specificity, or         both, as an antibody molecule described in Table 1 or 8, e.g.,         mAb001 (e.g., a humanized mAb001), A001-25, hWN01, hWNv1, 3E7,         3G1, 2C7, or 3D6,     -   f) Shows the same or similar binding affinity or specificity, or         both, as an ADC comprising an antibody molecule described in         Table 1 or 8, e.g., mAb001 (e.g., a humanized mAb001), A001-25,         hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   g) Shows the same or similar binding affinity or specificity, or         both, as an antibody molecule comprising a heavy chain variable         region and/or light chain variable region described in Table 1         or 8, e.g., a heavy chain variable region and/or light chain         variable region of mAb001 (e.g., a humanized mAb001), A001-25,         hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   h) Shows the same or similar binding affinity or specificity, or         both, as an antibody molecule comprising one or more (e.g., two         or three) heavy chain CDRs and/or one or more (e.g., two or         three) light chain CDRs described in Table 1 or 8, e.g., one or         more (e.g., two or three) heavy chain CDRs and/or one or more         (two or three) light chain CDRs of mAb001 (e.g., a humanized         mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   i) Shows the same or similar binding affinity or specificity, or         both, as an antibody molecule comprising an amino acid sequence         shown in Table 1 or 8,     -   j) Inhibits, e.g., competitively inhibits, the binding of a         second antibody molecule to a Gram-negative bacterium, LPS, or         both, wherein the second antibody molecule is an antibody         molecule chosen from Table 1 or 8, e.g., mAb001 (e.g., a         humanized mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   k) Binds the same or an overlapping epitope as a second antibody         molecule, wherein the second antibody molecule is an antibody         molecule chosen from Table 1 or 8, e.g., mAb001 (e.g., a         humanized mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   l) Competes for binding with a second antibody molecule to a         Gram-negative bacterium, LPS, or both, wherein the second         antibody molecule is an antibody molecule chosen from Table 1 or         8, e.g., mAb001 (e.g., a humanized mAb001), A001-25, hWN01,         hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   m) Has one or more biological properties of an antibody molecule         chosen from Table 1 or 8, e.g., mAb001 (e.g., a humanized         mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   n) Has one or more biological properties of an antibody molecule         chosen from Table 1 or 8, e.g., mAb001 (e.g., a humanized         mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,     -   o) Has one or more pharmacokinetic properties of an antibody         molecule chosen from Table 1 or 8, e.g., mAb001 (e.g., a         humanized mAb001), A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6,         or     -   p) Binds to one or more P. aeruginosa strains (e.g., one or         more P. aeruginosa strains described in Table 7) with high         affinity, e.g., with an avidity EC₅₀ of about 200 pM or less,         e.g., less than about 150 pM or less, about 120 pM or less,         about 100 pM or less, about 80 pM or less, about 60 pM or less,         or about 40 pM or less, e.g., between about 40 pM and about 120         pM, between about 50 pM and 110 pM, between about 60 pM and 100         pM, between about 40 pM and 80 pM, or between 80 pM and 120 pM.

In an aspect, the disclosure features an antibody molecule-drug conjugate (ADC) comprising a) an antibody molecule that binds to lipopolysaccharide (LPS) and b) an antimicrobial peptide.

In an embodiment, the ADC or antibody molecule binds to a core pentasaccharide region of the LPS. In an embodiment, the core pentasaccharide region comprises one or more (e.g., two) Kdo residues and one or more (e.g., two or three) Hep residues. In an embodiment, the ADC or antibody molecule binds to one or more (e.g., two) Kdo residues, or one or more (e.g., two or three) Hep residues, or any combination thereof.

In an embodiment, the ADC or antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 108); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 109, 145, or 146); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 107).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 108); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 109, 145, or 146); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 107).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 108); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 109, 145, or 146); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 107).

In an embodiment, the ADC or antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 110, 138, 140, or 144); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 111, 139, 141, 142, or 143); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 110, 138, 140, or 144); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 111, 139, 141, 142, or 143); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 110, 138, 140, or 144); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 111, 139, 141, 142, or 143); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the ADC or antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3),

wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 108); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 109, 145, or 146); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 107), and

wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 110, 138, 140, or 144); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 111, 139, 141, 142, or 143); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 108); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 109, 145, or 146); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 107), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 110, 138, 140, or 144); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 111, 139, 141, 142, or 143); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 108); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 109, 145, or 146); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 107), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 110, 138, 140, or 144); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 111, 139, 141, 142, or 143); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the ADC or antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 105); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 106); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 107).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 105); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 106); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 107).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 105); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 106); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 107).

In an embodiment, the ADC or antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 110, 138, 140, or 144); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 111, 139, 141, 142, or 143); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 110, 138, 140, or 144); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 111, 139, 141, 142, or 143); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 110, 138, 140, or 144); an LCDR2 comprising the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 111, 139, 141, 142, or 143); and an LCDR3 comprising the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the ADC or antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3),

wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 105); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 106); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 107), and

wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 110, 138, 140, or 144); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 111, 139, 141, 142, or 143); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 105); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 106); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 107), and

the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 110, 138, 140, or 144); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 111, 139, 141, 142, or 143); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 105); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 106); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 107), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 110, 138, 140, or 144); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 111, 139, 141, 142, or 143); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 or humanized mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the ADC or antibody molecule further comprises one or more human or human derived heavy or light chain variable region frameworks.

In an embodiment, the ADC or antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 103 or 115-118). In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOs: 103 or 115-118).

In an embodiment, the ADC or antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 104 or 119-137). In an embodiment, the light chain variable region comprises the amino acid sequence of the VL of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 104 or 119-137).

In an embodiment, the ADC or antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 103 or 115-118), and wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 104 or 119-137).

In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 103 or 115-118) and the light chain variable region comprises the amino acid sequence of the VL of antibody mAb001 or humanized mAb001 (e.g., any of SEQ ID NOS: 104 or 119-137).

In an embodiment, the ADC or antibody molecule comprises or consists of two heavy chain variable regions and two light chain variable regions. In an embodiment, the ADC or antibody molecule comprises a Fab, a F(ab′)2, an Fv, or a single chain Fv fragment (scFv).

In an embodiment, the ADC or antibody molecule further comprises a heavy chain constant region, a light chain constant region, or both. In an embodiment, the ADC or antibody molecule is an IgG antibody molecule, e.g., IgG1, IgG2, IgG3, or IgG4 antibody molecule. In an embodiment, the antibody molecule is not an IgM antibody molecule. In an embodiment, the ADC or antibody molecule comprises a light chain constant region from a kappa or lambda light chain.

In an embodiment, the antibody molecule is a monoclonal antibody molecule. In an embodiment, the antibody molecule is a humanized antibody molecule. In an embodiment, the antibody molecule is an isolated antibody molecule. In an embodiment, the antibody molecule is a synthetic antibody molecule.

In an embodiment, the ADC or antibody molecule binds to one or more bacteria, e.g., one or more Gram-negative bacteria, e.g., of different genera, species, subspecies, and/or strains.

In an embodiment, the one or more Gram-negative bacteria are selected from a species of Enterobacteriaceae (e.g., a species in Klebsiella, Enterobacter, Shigella, Escherichia, Salmonella, Yersinia, or Citrobacter, e.g., pan-resistant Enterobacteriaceae), a species of Pseudomonas, a species of Acinetobacter, or any combination thereof.

In an embodiment, the ADC or antibody molecule binds to one or more of: Klebsiella pneumonia (e.g., Klebsiella pneumoniae subsp. ozaenae, Klebsiella pneumoniae subsp. pneumoniae, or Klebsiella pneumoniae subsp. rhinoscleromatis), Enterobacter cancerogenous, Enterobacter cloacae, Enterobacter hormaechei, Enterobacter asburiae, Shigella boydii, Shigella dysenteriae, Shigella flexneri, Shigella sonnei, Escherichia coli (e.g., Escherichia coli ATCC 11775, Escherichia coli ATCC 25922, Escherichia coli ATCC 35401, or Escherichia coli ATCC 43895), Escherichia fergusonii, Salmonella choleraesuis, Salmonella choleraesuis subsp. indica, Salmonella enteritidis, Salmonella virchow, Salmonella paratyphi B, Salmonella typhimurium, Salmonella paratyphi A, Salmonella typhi, Salmonella choleraesuis subsp. arizonae, Salmonella choleraesuis subsp. diarizonae, Salmonella choleraesuis subsp. houtenae, Salmonella bongori, Citrobacter sedlakii, Citrobacter braakii, Citrobacter werkmanii, Citrobacter freundii, Citrobacter youngae, Citrobacter amalonaticus, Yersinia enterocolitica, Yersinia frederiksenii, Yersinia pestis, Yersinia pseudotuberculosis, Pseudomonas aeruginosa, Acinetobacter baumannii, or any combination thereof. In an embodiment, the ADC or antibody molecule binds to Pseudomonas aeruginosa.

In an embodiment, the one or more bacteria are one or more antibiotic-resistant bacteria, e.g., one or more multidrug-resistant Gram-negative bacteria.

In an embodiment, the one or more antibiotic-resistant bacteria are selected from Pseudomonas (e.g., P. aeruginosa), Enterobacteriaceae (e.g., Klebsiella pneumonia or E. coli), or Acinetobacter (e.g., A. baumannii).

In an embodiment, the ADC or antibody molecule binds to one or more of: Enterococcus faecium (e.g., vancomycin-resistant (VRE) Enterococcus faecium), Staphylococcus aureus (e.g., methicillin-resistant (MRSA) Staphylococcus aureus), Clostridium difficile, Acinetobacter baumannii (e.g., multidrug resistant (MDR) Acinetobacter), Pseudomonas aeruginosa (e.g., multidrug resistant (MDR) P. aeruginosa, e.g., carbapenem-resistant P. aeruginosa), Enterobacteriaceae (e.g., E. coli, K. pneumoniae, or Enterobacter spp., e.g., carbapenem-resistant Enterobacteriaceae (CRE)), N. gonorrhoaeae (e.g., drug-resistant N. gonorrhoaeae), Salmonella (e.g., drug resistant Salmonella), Shigella (e.g., drug-resistant Shigella), a bacterium producing an extended spectrum β-lactamase (ESBL), or Mycobacterium tuberculosis (e.g., drug-resistant M. tuberculosis).

In an embodiment, the ADC or antibody molecule binds to one or more (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, or all) P. aeruginosa strains in Table 7. In another embodiment, the ADC or antibody molecule binds to one or more (e.g., 2, 3, 4, 5, 6, or all) multidrug-resistant P. aeruginosa strains in Table 7.

In an embodiment, the ADC or antibody molecule binds to LPS with high affinity, e.g., with a K_(D) that is less than about 10 nM, e.g., measured by an ELISA method.

In an embodiment, the ADC or antibody molecule binds to LPS with a K_(off) slower than 1×10⁻⁴, 5×10⁻⁵, or 1×10⁻⁵ s⁻¹. In an embodiment, the ADC or antibody molecule binds to LPS with a K_(on) faster than 1×10⁴, 5×10⁴, 1×10⁵, or 5×10⁵ M⁻¹ s⁻¹.

In an embodiment, the antibody molecule has opsonophagocytic activity, e.g., as determined by an OPA assay, e.g., as described herein.

In an embodiment, the ADC or antibody molecule binds to an epitope comprising one or more (e.g., two) Kdo residues and/or one or more (e.g., two or three) Hep residues in LPS.

In an embodiment, a) the antibody molecule that binds to lipopolysaccharide (LPS) is coupled (e.g., fused) to b) the antimicrobial peptide.

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region is coupled (e.g., fused) to the antimicrobial peptide. In an embodiment, the heavy chain variable region is N-terminal to the antimicrobial peptide. In another embodiment, the heavy chain variable region is C-terminal to the antimicrobial peptide. In an embodiment, the VH is fused to the antimicrobial peptide to form a fusion polypeptide, e.g., encoded by an open reading frame.

In an embodiment, the heavy chain variable region is coupled (e.g., fused) to the antimicrobial peptide indirectly, e.g., wherein the C-terminus of the heavy chain variable region is coupled (e.g., fused) to the N-terminus of the antimicrobial peptide via a constant region, a linker, or both.

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region is coupled (e.g., fused) to the antimicrobial peptide. In an embodiment, the light chain variable region is N-terminal to the antimicrobial peptide. In another embodiment, the heavy chain variable region is C-terminal to the antimicrobial peptide. In an embodiment, the VL is fused to the antimicrobial peptide to form a fusion polypeptide, e.g., encoded by an open reading frame.

In an embodiment, the light chain variable region is coupled (e.g., fused) to the antimicrobial peptide indirectly, e.g., wherein the C-terminus of the light chain variable region is coupled (e.g., fused) to the N-terminus of the antimicrobial peptide via a constant region, a linker, or both.

In an embodiment, the antibody molecule comprises a sortase acceptor sequence comprising a sortase recognition sequence. For example, the sortase recognition sequence can have the amino acid sequence of LPXTG (e.g., for Staphylococcus aureus sortase A) (SEQ ID NO: 160) or LPXTA (e.g., for Streptococcus pyogenes sortase A) (SEQ ID NO: 161), wherein X can be any amino acid residue. In an embodiment, the sortase recognition sequence is LPETG (SEQ ID NO: 162). The sortase acceptor sequence may contain additional sequence(s) other than the sortase recognition sequence. In an embodiment, the sortase acceptor sequence further comprises a linker sequence, e.g., a tandem repeat of glycine-serine peptide linker sequences (e.g., (GS)₁₅ (SEQ ID NO: 157)). In an embodiment, a heavy chain of the antibody molecule comprises a sortase acceptor sequence, e.g., at the C-terminus. In an embodiment, a light chain of the antibody molecule comprises a sortase acceptor sequence, e.g., at the C-terminus.

In an embodiment, a heavy chain of the antibody molecule comprises a first sortase acceptor sequence and a light chain of the antibody molecule comprises a second sortase acceptor sequence. In an embodiment, the sortase acceptor sequence, e.g., the first sortase recognition sequence, comprises the amino acid sequence of (GS)₆LPETGGG (SEQ ID NO: 24). In another embodiment, the sortase acceptor sequence, e.g., the second sortase acceptor sequence, comprises the amino acid sequence of P(G₄S)₂LPETGGSG (SEQ ID NO: 26).

In an embodiment, the ADC comprises two or more (e.g., three, four, five, six, seven, eight, or more) antimicrobial peptides. In an embodiment, at least two of the antimicrobial peptides are identical or substantially identical. In an embodiment, at least two of the antimicrobial peptides are different. For example, a plurality of antimicrobial peptides can be coupled (e.g., fused) to the antibody molecule (e.g., a heavy chain (or a portion thereof), a light chain (or a portion thereof), or both).

In an embodiment, the ADC comprises two or more (e.g., three or four) identical, or substantially identical, antimicrobial peptides, each is coupled (e.g., fused) to a heavy chain variable region, e.g., indirectly, e.g., via a constant region, linker, or both. In an embodiment, the ADC comprises two or more (e.g., three or four) identical, or substantially identical, antimicrobial peptides, each is coupled (e.g., fused) to a light chain variable region, e.g., indirectly, e.g., via a constant region, linker, or both. In an embodiment, the ADC comprises two identical, or substantially identical, antimicrobial peptides, each is coupled (e.g., fused) to a heavy chain variable region, e.g., indirectly, e.g., via a constant region, linker, or both. In an embodiment, the ADC comprises two identical, or substantially identical, antimicrobial peptides, each is coupled (e.g., fused) to a light chain variable region, e.g., indirectly, e.g., via a constant region, linker, or both. In an embodiment, the ADC comprises at least four identical, or substantially identical, antimicrobial peptides. In an embodiment, the ADC or antibody molecule comprises two heavy chain variable regions and two light chain variable regions, and each of the heavy and light chain variable regions is coupled (e.g., fused) with at least one antimicrobial peptide, e.g., indirectly, e.g., via a constant region, linker, or both.

In an embodiment, the antimicrobial peptide is coupled to the antibody molecule by enzymatic conjugation (e.g., a sortase reaction). In an embodiment the antimicrobial peptide is coupled to the antibody molecule by chemical conjugation.

In an embodiment, the ADC is more effective in inhibiting, e.g., inhibiting the growth, virulence, or infectivity of, a Gram-negative bacterium (e.g., a Gram-negative bacterium described herein) than the antimicrobial peptide or antibody molecule alone, e.g., having a minimum inhibitory concentration (MIC) that is lower, e.g., at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 fold lower, than the MIC of the antimicrobial peptide alone.

In an embodiment, the ADC is more effective in reducing the viability of, e.g., killing, a Gram-negative bacterium (e.g., a Gram-negative bacterium described herein) than the antimicrobial peptide or antibody molecule alone, e.g., having a minimum bactericidal concentration (MBC) that is lower, e.g., at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 fold lower, than the MIC of the antimicrobial peptide alone.

In an embodiment, the ADC has opsonophagocytosis activity (e.g., is phagocytized when bound to the Fc receptor (FcR) of a neutrophil), e.g., as determined by an OPA assay, e.g., as described herein.

In an embodiment, the ADC does not inhibit, e.g., does not inhibit the growth, virulence, or infectivity of, a Gram-positive bacterium (e.g., a Gram-positive bacterium described herein), e.g., having a minimum inhibitory concentration (MIC) for a Gram-negative bacterium (e.g., a Gram-negative bacterium) that is lower, e.g., at least 2, 5, 10, 20, 50, 100, 200, 500, or 1000 fold lower, than a MIC for a Gram-positive bacterium (e.g., a Gram-positive bacterium).

In an embodiment, the ADC does not reduce the viability of, e.g., does not kill, a Gram-positive bacterium (e.g., a Gram-positive bacterium described herein), e.g., having a minimum bactericidal concentration (MBC) for a Gram-negative bacterium (e.g., a Gram-negative bacterium) that is lower, e.g., at least 2, 5, 10, 20, 50, 100, 200, 500, or 1000 fold lower fold lower, than a MBC for a Gram-positive bacterium (e.g., a Gram-positive bacterium). In an embodiment, the Gram-positive bacterium is Staphylococcus aureus.

In an embodiment, the ADC does not alter, or does not significantly alter microbiome (e.g., is microbiome sparing).

In an embodiment, the antimicrobial peptide comprises or consists of an alpha-helical antimicrobial peptide, e.g., a peptide comprising turns where residues i and i+4 are on the same face.

In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, or 5 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 96%, 97%, 98%, 99%, or 100% homology with, an amino acid sequence described herein, e.g., any of SEQ ID NOS: 67-80, 94-102, 147-156, 158-159, or 163-164. In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence described herein e.g., any of SEQ ID NOS: 67-80, 94-102, 147-156, 158-159, or 163-164. In an embodiment, the antimicrobial peptide comprises a carboxamide group (e.g., a C-terminal carboxamide functional group).

In an embodiment, the antimicrobial peptide comprises 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more D-amino acids. In another embodiment, at least 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, or 100% of the amino acid residues of the antimicrobial peptide are D-amino acids.

In an embodiment, the antimicrobial peptide comprises a first cysteine residue and a second cysteine residue, and wherein the first cysteine residue is cross-linked to the second cysteine residue.

In an embodiment, the antimicrobial peptide is a broad spectrum antimicrobial peptide, e.g., having antimicrobial activity against 2, 3, or all of the following: at least one species of Enterobacteriaceae (e.g., one or more species of Klebsiella, Enterobacter, Shigella, Escherichia, Salmonella, Yersinia, or Citrobacter, e.g., pan-resistant Enterobacteriaceae), at least one species of Pseudomonas, or at least one species of Acinetobacter.

In an embodiment, the antimicrobial peptide is a broad spectrum antimicrobial peptide, e.g., having antimicrobial activity against 2, 3, 4, 5, 6, or all of the following: at least one species of Klebsiella, at least one species of Enterobacter, at least one species of Shigella, at least one species of Escherichia, at least one species of Salmonella, at least one species of Yersinia, or at least one species of Citrobacter.

In an embodiment, the antimicrobial peptide has a minimum inhibitory concentration (MIC) of less than 100 μg/ml, e.g., less than 90, 80, 70, 60, 50, 40, 30, 20, 10, or 5 μg/ml, for a bacterial strain described herein, e.g., Escherichia coli (e.g., Escherichia coli ATCC 25922), Pseudomonas aeruginosa (e.g., Pseudomonas aeruginosa ATCC27853), or both.

In an embodiment, the antimicrobial peptide has a minimum bactericidal concentration (MBC) of less than 100 μg/ml, e.g., less than 90, 80, 70, 60, 50, 40, 30, 20, 10, or 5 μg/ml, for a bacterial strain described herein, e.g., Escherichia coli (e.g., Escherichia coli ATCC 25922), Pseudomonas aeruginosa (Pseudomonas aeruginosa ATCC27853), or both.

In an embodiment, the antimicrobial peptide has low hemolytic activity, e.g., has a partial lytic concentration (PLC) to MIC ratio for a Gram-negative bacterium (e.g., a Gram-negative bacterium described herein) which is greater than 4:1 (e.g., greater than 8:1, 16:1, 24:1, or 32:1), e.g., as determined by a red blood cell hemolysis assay and an MIC assay, respectively. In an embodiment, the PLC is the concentration (e.g., minimum concentration) that results in lysis of 50% of the red blood cells.

In an embodiment, the antimicrobial peptide has low hemolytic activity, e.g., has a partial lytic concentration (MLC) to MIC ratio for a Gram-negative bacterium (e.g., a Gram-negative bacterium described herein) which is greater than 4:1 (e.g., greater than 8:1, 16:1, 24:1, or 32:1), e.g., as determined by a red blood cell hemolysis assay and an MIC assay, respectively. In an embodiment, the MLC is the concentration (e.g., minimum concentration) that results in lysis of 100% of the red blood cells.

In an aspect, the disclosure features a composition, e.g., a pharmaceutical composition, comprising an ADC described herein and a pharmaceutically acceptable carrier.

In an aspect, the disclosure features a method of treating or preventing a bacterial infection or a related disorder, comprising administering to a subject in need thereof an ADC described herein, or a pharmaceutical composition described herein, in an amount effective to treat or prevent the bacterial infection or related disorder.

In an embodiment, the bacterial infection is a Gram-negative bacterial infection. In an embodiment, the disorder is caused by, or associated with, a Gram-negative bacterial infection.

In an embodiment, the ADC is administered at a dose of 0.1-100 mg/kg, e.g., 0.1-50 mg/kg or 1-10 mg/kg, e.g., 1-5 or 5-10 mg/kg. In an embodiment, the ADC is administered intravenously, subcutaneously, or intranasally or by inhalation.

In an embodiment, the ADC is administered prior to onset of a symptom associated with the bacterial infection or related disorder. In an embodiment, the ADC is administered at or after onset of a symptom associated with the bacterial infection or related disorder.

In an embodiment, the subject has one or more of pneumonia (e.g., community-acquired pneumonia and hospital-acquired pneumonia), a urinary tract infection (UTI), septicemia, meningitis, diarrhea (e.g., traveler's diarrhea), a soft tissue infection, a skin infection, bacteremia, a respiratory system infection (e.g., a lower respiratory tract infection), endocarditis, an intra-abdominal infection, septic arthritis, osteomyelitis, a CNS infection, an ophthalmic infection, cholecystitis, cholangitis, meningitis (e.g., neonatal meningitis), typhoid fever, food poisoning, gastroenteritis, enteric fever, shigellosis, a blood stream infection, intra-abdominal sepsis, a brain abscess, meningitis, sepsis (e.g., neonatal sepsis), a joint infection, a bone infection, a gastrointestinal infection, or a wound infection.

In an embodiment, the bacterial infection is a nosocomial infection or a hospital-acquired infection. In an embodiment, the disorder related to bacterial infection is associated with a nosocomial infection or a hospital-acquired infection.

In an embodiment, the subject is a human or an animal. In an embodiment, the subject is an immunocompromised patient, e.g., a subject having an HIV infection or AIDS, cancer, solid organ transplantation, stem cell transplantation, sickle cell disease or asplenia, a congenital immune deficiency, a chronic inflammatory condition, a cochlear implant, malnutrition, or a cerebrospinal fluid leak. In an embodiment, the subject is a health professional.

In an embodiment, the subject is 18 years old or younger, e.g., 15 years old or younger, 12 years old or younger, 9 years old or younger, 6 years old or younger, or 3 years old or younger. In an embodiment, the subject is at least 60 years old, e.g., at least 65 years old, at least 70 years old, at least 75 years old, or at least 80 years old.

In an embodiment, the method further comprises administering to the subject a second antimicrobial agent or therapy, e.g., an antibiotic or phage therapy.

In an embodiment, the antibiotic is selected from the group consisting of an aminoglycoside (e.g., amikacin, gentamicin, kanamycin, neomycin, netilmicin, tobramycin, paromomycin, streptomycin, or spectinomycin), an ansamycin (e.g., geldanamycin, herbimycin, or rifaximin), a carbacephem (e.g., loracarbef), a carbapenem (e.g., ertapenem, doripenem, imipenem/cilastatin, or meropenem), a cephalosporin (cefadroxil, cefazolin, cefalotin, cefalothin, cephalexin, cefaclor, cefamandole, cefoxitin, cefprozil, cefuroxime, cefixime, cefdinir, cefditoren, cefoperazone (e.g., in combination with sulbactam), cefotaxime, cefpodoxime, ceftazidime, ceftibuten, ceftizoxime, ceftriaxone, cefepime, ceftaroline fosamil, or ceftobiprole), a glycopeptide (e.g., teicoplanin, vancomycin, telavancin, dalbavancin, or oritavancin), a lincosamide (e.g., clindamycin or lincomycin), lipopeptide (e.g., daptomycin), a macrolide (e.g., azithromycin, clarithromycin, dirithromycin, erythromycin, roxithromycin, troleandomycin, telithromycin, or spiramycin), a monobactam (e.g., aztreonam), a nitrofuran (e.g., furazolidone or nitrofurantoin), an oxazolidinone (e.g., linezolid, posizolid, radezolid, torezolid), a penicillin (e.g., amoxicillin, ampicillin, azlocillin, carbenicillin, cloxacillin, dicloxacillin, flucloxacillin, mezlocillin, methicillin, nafcillin, oxacillin, penicillin g, penicillin v, piperacillin, penicillin g, temocillin, or ticarcillin), a penicillin combination (e.g., amoxicillin/clavulanate, ampicillin/sulbactam, piperacillin/tazobactam, or ticarcillin/clavulanate), a polypeptide (e.g., bacitracin, colistin, or polymyxin b), a quinolone/fluoroquinolone (e.g., ciprofloxacin, enoxacin, gatifloxacin, gemifloxacin, levofloxacin, lomefloxacin, moxifloxacin, nalidixic acid, norfloxacin, ofloxacin, trovafloxacin, grepafloxacin, sparfloxacin, or temafloxacin), a sulfonamide (e.g., mafenide, sulfacetamide, sulfadiazine, silver sulfadiazine, sulfadimethoxine, sulfamethizole, sulfamethoxazole, sulfanilimide, sulfasalazine, sulfisoxazole, trimethoprim-sulfamethoxazole (co-trimoxazole), or sulfonamidochrysoidine), a tetracycline (e.g., demeclocycline, doxycycline, minocycline, oxytetracycline, or tetracycline), a drug against mycobacteria (e.g., clofazimine, dapsone, capreomycin, cycloserine, ethambutol, ethionamide, isoniazid, pyrazinamide, rifampin, rifabutin, rifapentine, or streptomycin), or others (e.g., arsphenamine, chloramphenicol, fosfomycin, fusidic acid, metronidazole, mupirocin, platensimycin, quinupristin/dalfopristin, thiamphenicol, tigecycline, tinidazole, or trimethoprim).

In an embodiment, the antibiotic is selected from levofloxacin, ciprofloxacin, gentamicin, ceftriaxone, ofloxacin, amikacin, tobramycin, aztreonam, or imipenem/cilastatin.

In an embodiment, the second antimicrobial agent or therapy is administered before the ADC is administered, concurrently with the administration of the ADC, or after the ADC is administered.

In an aspect, the disclosure features a method of inhibiting or reducing a bacterial infection (e.g., Gram-negative bacterial infection), comprising contacting a cell (e.g., in a sample) or a subject in need thereof an ADC described herein, or a pharmaceutical composition described herein, in an amount effective to inhibit or reduce the bacterial infection.

In an embodiment, the ADC is contacted with the cell or subject in vitro, ex vivo, or in vivo.

In an aspect, the disclosure features an ADC described herein for use in treating or preventing a bacterial infection (e.g., a Gram-negative bacterial infection) or related disorder described herein.

In another aspect, the disclosure features use of an ADC described herein in the manufacture of a medicament for treating or preventing a bacterial infection (e.g., a Gram-negative bacterial infection) or related disorder described herein.

In an aspect, the disclosure features a kit comprising an ADC described herein or a pharmaceutical composition described herein.

In an embodiment, the kit further comprises instructions for use of the ADC or pharmaceutical composition.

In an aspect, the disclosure features a container comprising an ADC described herein or a pharmaceutical composition described herein.

In an aspect, the disclosure features a nucleic acid molecule (e.g., an isolated nucleic acid molecule) that encodes an ADC described herein, e.g., a VH, a VL; or both, or a heavy chain, a light chain, or both, of an antibody molecule described herein, coupled (e.g., fused) to an antimicrobial peptide, as described herein.

In an embodiment, the nucleic acid molecule comprises a nucleotide sequence described in Table 2, e.g., any of SEQ ID NOS: 81-93 or 113-114.

In an aspect, the disclosure features a vector comprising a nucleic acid molecule described herein.

In an aspect, the disclosure features a cell (e.g., an isolated cell) comprising a nucleic acid molecule described herein or a vector described herein.

In an aspect, the disclosure features a method of producing an ADC described herein, the method comprising culturing a cell described herein under conditions that allow production of an ADC, thereby producing the ADC described herein.

In another aspect, the disclosure features a method of producing an ADC described herein, the method comprises contacting an antibody molecule (e.g., an antibody molecule described herein) with a peptide (e.g., a peptide comprising an antimicrobial peptide described herein, and optionally, a sortase donor sequence), in the presence of a sortase, under conditions that allow a sortase-mediated reaction to occur, thereby producing the ADC.

In an embodiment, the antibody molecule comprises a sortase acceptor sequence, e.g., a sortase acceptor sequence described herein. In an embodiment, a heavy chain of the antibody molecule comprises a sortase acceptor sequence, e.g., at the C-terminus. In an embodiment, a light chain of the antibody molecule comprises a sortase acceptor sequence, e.g., at the C-terminus. In an embodiment, the sortase acceptor sequence further comprises a linker sequence, e.g., a tandem repeat of glycine-serine peptide linker sequences.

In an embodiment, a heavy chain of the antibody molecule comprises a first sortase acceptor sequence and a light chain of the antibody molecule comprises a second sortase acceptor sequence. In an embodiment, the sortase acceptor sequence, e.g., the first sortase recognition sequence, comprises the amino acid sequence of (GS)₆LPETGGG (SEQ ID NO: 24). In another embodiment, the sortase acceptor sequence, e.g., the second sortase acceptor sequence, comprises the amino acid sequence of P(G₄S)₂LPETGGSG (SEQ ID NO: 26).

In an embodiment, the peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, or 5 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 96%, 97%, 98%, 99%, or 100% homology with, an amino acid sequence described herein, e.g., any of SEQ ID NOS: 67-80, 94-102, 147-156, 158-159, or 163-164. In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence described herein e.g., any of SEQ ID NOS: 67-80, 94-102, 147-156, 158-159, or 163-164. In an embodiment, the antimicrobial peptide comprises a carboxamide group (e.g., a C-terminal carboxamide functional group).

In an embodiment, 1.5 mg/mL antibody molecule is contacted with 20 mol equivalents of sortase donor peptide per sortase acceptor sequence, and 1 mol equivalent of sortase per 75 mol equivalents of sortase acceptor sequence. In an embodiment, the contacting is performed in the presence of 150 mM NaCl, 50 mM Tris (pH 7.5), and 10 mM CaCl₂. In an embodiment, the contacting is performed at 18° C. to 37° C., e.g., at 25° C., e.g., for 2 to 48 hours, e.g., 18 to 24 hours, e.g., 20 hours. In an embodiment, the sortase is a sortase A pentamutant.

In an embodiment, the further comprises detecting the sortase-mediated reaction, e.g., by Q-TOF mass spectrometry. In an embodiment, the further comprises purifying the ADC, e.g., by gel electrophoresis.

In an aspect, the disclosure features a reaction mixture comprising:

(i) a sortase, e.g., a sortase described herein, and

(ii) an antibody molecule described herein, an antimicrobial peptide described herein, or both.

In an aspect, the disclosure features an antibody molecule described herein.

In an aspect, the disclosure features a nucleic acid molecule (e.g., an isolated nucleic acid molecule) that encodes an antibody molecule described herein, e.g., a VH, a VL, or both; or a heavy chain, a light chain, or both, of the antibody molecule described herein.

In an aspect, the disclosure features a vector comprising a nucleic acid molecule encoding an antibody molecule described herein.

In an aspect, the disclosure features a cell (e.g., an isolated cell) comprising a nucleic acid molecule encoding an antibody molecule described herein or a vector described herein.

In an aspect, the disclosure features a method of producing an antibody molecule described herein, the method comprising culturing a cell described herein under conditions that allow production of an antibody molecule, thereby producing the antibody molecule described herein.

In an aspect, the disclosure features an antimicrobial peptide (e.g., an isolated or synthetic antimicrobial peptide) described herein.

In an aspect, the disclosure features a nucleic acid molecule (e.g., an isolated nucleic acid molecule) that encodes an antimicrobial peptide described herein.

In an aspect, the disclosure features a vector comprising a nucleic acid molecule encoding an antimicrobial peptide described herein.

In an aspect, the disclosure features a cell (e.g., an isolated cell) comprising a nucleic acid molecule encoding an antimicrobial peptide described herein or a vector of described herein.

In an aspect, the disclosure features a method of producing an antimicrobial peptide described herein, the method comprising culturing a cell of described herein under conditions that allow production of an antimicrobial peptide, thereby producing the antimicrobial peptide described herein.

In an aspect, the disclosure features an antibody molecule that binds to the same epitope, or substantially the same epitope, as an antibody molecule described herein.

In an aspect, the disclosure features an ADC comprising: a) an antibody molecule that binds to the same epitope, or substantially the same epitope, as an antibody molecule described herein; and b) an antimicrobial peptide, e.g., an antimicrobial peptide described herein.

In an aspect, the disclosure features an antibody molecule that competes for binding with an antibody molecule described herein.

In an aspect, the disclosure features an ADC comprising: a) an antibody molecule that competes for binding with an antibody molecule described herein; and b) an antimicrobial peptide, e.g., an antimicrobial peptide described herein.

The disclosure contemplates all combinations of any one or more of the foregoing aspects and/or embodiments, as well as combinations with any one or more of the embodiments set forth in the detailed description and examples.

Other features, objects, and advantages of the compositions and methods herein will be apparent from the description and drawings, and from the claims.

Figures and Tables are provided herewith.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 depicts the composition and structure of core pentasaccharides of several exemplary Gram-negative bacteria.

FIG. 2 depicts the binding of antibody 3E7 to E. coli (Eco) and K. pneumoniae (Kpn) as determined by ELISA.

FIG. 3 depicts the binding of antibody A001-25 to E. coli (Eco) and K. pneumoniae (Kpn) as determined by ELISA.

FIG. 4 depicts the process of crosslinking an exemplary alpha-helical peptide (SEQ ID NO: 158).

FIG. 5 depicts the readout of an exemplary MIC assay.

FIG. 6 depicts the mass spectrometry characterization of Sortase-ligation products using QTof. All samples were reduced with DTT prior to analysis. Top: The Sortase-tagged heavy chain at 52,201 corresponds with the theoretical molecular weight based on the peptide sequence; Bottom: The Sortase-ligated reaction product shows a strong signal at 55002 corresponding to the theoretical molecular weight for the ligated construct.

FIG. 7 depicts the binding of antibody 2C7 to representative E. coli (Eco), K. pneumoniae (Kpn) and S. typhimurium (Sty) strains.

FIG. 8 depicts the binding of antibody 3D6 to representative E. coli (Eco), K. pneumoniae (Kpn) and S. typhimurium (Sty) strains.

FIG. 9 depicts the binding of antibody 3E7 to representative E. coli (Eco), K. pneumoniae (Kpn) and S. typhimurium (Sty) strains.

FIG. 10 depicts the binding of antibody 3G1 to representative E. coli (Eco), K. pneumoniae (Kpn) and S. typhimurium (Sty) strains.

FIG. 11A depicts the % killing of Pseudomonas, E. coli, and Klebsiella spp. in a mixed microbial killing assay using an exemplary ADC at 8 μg/ml.

FIG. 11B depicts the % killing of Pseudomonas, E. coli, and Klebsiella spp. in a mixed microbial killing assay using an exemplary antibody alone at 125 μg/ml.

FIG. 11C depicts the % killing of Pseudomonas, E. coli, and Klebsiella spp. in a mixed microbial killing assay using an exemplary peptide alone at 0.3 μg/ml.

FIG. 11D depicts the % killing of Pseudomonas, E. coli, and Klebsiella spp. in a mixed microbial killing assay using a combination of antibody at 125 μg/ml and peptide at 0.3 μg/ml.

FIG. 12 depicts the binding of an exemplary ADC to P. aeruginosa strains.

FIG. 13 depicts the binding of an exemplary ADC to bacterial surface.

FIG. 14 depicts the reduction of bacterial burden in lung in a murine acute pneumonia model.

FIG. 15A depicts the serum stability of an exemplary AMP without stapling. FIG. 15A discloses SEQ ID NO: 101.

FIG. 15B depicts the serum stability of an exemplary AMP with stapling. FIG. 15B discloses SEQ ID NO: 159.

FIG. 15C depicts the difference in serum stability between an unoptimized payload and an optimized payload.

FIG. 16 depicts the effect of antibody mAb001 on endotoxin (Pseudomonas LPS) signal measured by a cell-based colorimetric assay.

FIG. 17 depicts the selective killing activity of an exemplary ADC against Pseudomonas.

FIG. 18A depicts the reduction of bacterial burden in lung by an exemplary ADC in a murine acute pneumonia model (co-administration study arm).

FIG. 18B depicts the reduction of bacterial burden in lung by an exemplary ADC in a murine acute pneumonia model (intranasal study arm).

FIG. 19 depicts the bioavailability of an exemplary ADC.

FIG. 20 depicts the stability of an exemplary L-amino acid-containing antimicrobial peptide in human serum.

FIG. 21 depicts the stability of an exemplary D-amino acid-containing antimicrobial peptide in human serum.

BRIEF DESCRIPTION OF THE TABLES

Table 1 depicts the amino acid sequences of the heavy chain variable regions (VHs), light chain variable regions (VLs), heavy chain CDRs (HCDRs), and light chain CDRs (LCDRs) of the exemplary antibody molecules. Heavy and light chain CDRs defined according to Chothia system and Kabat system are shown.

Table 2 depicts the nucleotide sequences of the heavy chain variable regions (VHs) and light chain variable regions (VLs) of the exemplary antibody molecules.

Table 3 depicts the amino acid sequences of the exemplary antimicrobial peptides.

Table 4 depicts exemplary MIC control compound values.

Table 5 depicts targeted in vitro activity of exemplary ADC, antibody molecule and peptide.

Table 6A depicts the inhibitory and hemolytic activities of exemplary antimicrobial peptides.

Table 6B depicts the structure-activity relationships for exemplary AMPs.

Table 7 depicts the binding avidity of an exemplary ADC to P. aeruginosa (EC₅₀).

Table 8 depicts the amino acid sequences of heavy chain variable regions (VHs), light chain variable regions (VLs), heavy chain CDRs (HCDRs), and light chain CDRs (LCDRs) of exemplary humanized antibody molecules. Heavy and light chain CDRs defined according to Chothia system and Kabat system are shown.

Table 9 depicts the microbial killing activity of exemplary ADCs against P. aeruginosa stains.

Table 10 depicts the microbial killing activity of exemplary ADCs against MDR strains.

DETAILED DESCRIPTION

Disclosed herein are antibody molecules and antibody molecule-drug conjugates (ADCs) that bind to bacteria, e.g., Gram-negative bacteria, e.g., lipopolysaccharides on the outer membrane of Gram-negative bacteria, with high affinity and specificity. The ADCs disclosed herein can include an antibody molecule and an antimicrobial peptide (AMP). Advantageously, compared to antimicrobial peptides alone, several of the ADCs describe herein have improved ability to inhibit or reduce the viability of one or more bacteria (e.g., Gram-negative bacteria) of different genera, species, and/or subspecies. Nucleic acid molecules encoding the antibody molecules, ADCs, and antimicrobial peptides, expression vectors, host cells, compositions (e.g., pharmaceutical compositions), kits, and methods for making the antibody molecules, ADCs, and antimicrobial peptides, are also provided. The antibody molecules, ADCs, antimicrobial peptides, and pharmaceutical compositions disclosed herein can be used (alone or in combination with other agents or therapeutic modalities) to treat, prevent and/or diagnose bacterial infections or related disorders and conditions, e.g., caused by Gram-negative bacteria.

In an embodiment, the ADCs described herein can have one or more of the following properties: (i) is capable of treating or preventing a bacterial disease in a patient with unmet medical need; (ii) is capable of treating a genus and species of bacteria causing a bacterial disease; acts via a new mechanism of action; (iii) has an added inhibitor that reduces or neutralizes a mechanism of resistance; or (iv) has an alteration in the structure of the molecule that reduces or neutralizes a mechanism of resistance.

In an embodiment, the ADC has an opsonophagocytosis activity (e.g., via an antibody molecule), a bactericidal activity (e.g., via a payload, e.g., an antimicrobial peptide), or both. Without wishing to be bound by theory, it is believed that in an embodiment, the use of an antimicrobial peptide in ADC can achieve one or more of the following goals: a new target with low resistance, synergistic efficacy with lower spontaneous resistance probability, improved directed treatment, or rapid bactericidal activity. In an embodiment, the ADC targets a core LPS region, e.g., to reduce the probability of resistance caused by potential target site alteration. In another embodiment, peptide stapling is used to increase activity and/or stability, e.g., to reduce or prevent potential antibiotic inactivation.

Definitions

As used herein, the articles “a” and “an” refer to one or to more than one (e.g., to at least one) of the grammatical object of the article.

The term “or” is used herein to mean, and is used interchangeably with, the term “and/or”, unless context clearly indicates otherwise.

“About” and “approximately” shall generally mean an acceptable degree of error for the quantity measured given the nature or precision of the measurements. Exemplary degrees of error are within 20 percent (%), typically, within 10%, and more typically, within 5% of a given value or range of values.

The compositions and methods disclosed herein encompass polypeptides and nucleic acids having the sequences specified, or sequences substantially identical or similar thereto, e.g., sequences at least 85%, 90%, 95% identical or higher to the sequence specified.

In the context of an amino acid sequence, the term “substantially identical” is used herein to refer to a first amino acid that contains a sufficient or minimum number of amino acid residues that are i) identical to, or ii) conservative substitutions of aligned amino acid residues in a second amino acid sequence such that the first and second amino acid sequences can have a common structural domain and/or common functional activity. For example, amino acid sequences that contain a common structural domain having at least about 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99% identity to a reference sequence, e.g., a sequence provided herein.

In the context of nucleotide sequence, the term “substantially identical” is used herein to refer to a first nucleic acid sequence that contains a sufficient or minimum number of nucleotides that are identical to aligned nucleotides in a second nucleic acid sequence such that the first and second nucleotide sequences encode a polypeptide having common functional activity, or encode a common structural polypeptide domain or a common functional polypeptide activity. For example, nucleotide sequences having at least about 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99% identity to a reference sequence, e.g., a sequence provided herein.

The term “functional variant” refers polypeptides that have a substantially identical amino acid sequence to the naturally-occurring sequence, or are encoded by a substantially identical nucleotide sequence, and are capable of having one or more activities of the naturally-occurring sequence.

Calculations of homology or sequence identity between sequences (the terms are used interchangeably herein) are performed as follows.

To determine the percent identity of two amino acid sequences, or of two nucleic acid sequences, the sequences are aligned for optimal comparison purposes (e.g., gaps can be introduced in one or both of a first and a second amino acid or nucleic acid sequence for optimal alignment and non-homologous sequences can be disregarded for comparison purposes). In a typical embodiment, the length of a reference sequence aligned for comparison purposes is at least 30%, e.g., at least 40%, 50%, 60%, e.g., at least 70%, 80%, 90%, 100% of the length of the reference sequence. The amino acid residues or nucleotides at corresponding amino acid positions or nucleotide positions are then compared. When a position in the first sequence is occupied by the same amino acid residue or nucleotide as the corresponding position in the second sequence, then the molecules are identical at that position.

The percent identity between the two sequences is a function of the number of identical positions shared by the sequences, taking into account the number of gaps, and the length of each gap, which need to be introduced for optimal alignment of the two sequences.

The comparison of sequences and determination of percent identity between two sequences can be accomplished using a mathematical algorithm. In some embodiments, the percent identity between two amino acid sequences is determined using the Needleman and Wunsch ((1970) J. Mol. Biol. 48:444-453) algorithm which has been incorporated into the GAP program in the GCG software package (available at www.gcg.com), using either a Blossum 62 matrix or a PAM250 matrix, and a gap weight of 16, 14, 12, 10, 8, 6, or 4 and a length weight of 1, 2, 3, 4, 5, or 6. In certain embodiments, the percent identity between two nucleotide sequences is determined using the GAP program in the GCG software package (available at www.gcg.com), using a NWSgapdna.CMP matrix and a gap weight of 40, 50, 60, 70, or 80 and a length weight of 1, 2, 3, 4, 5, or 6. One suitable set of parameters (and the one that should be used unless otherwise specified) are a Blossum 62 scoring matrix with a gap penalty of 12, a gap extend penalty of 4, and a frameshift gap penalty of 5.

The percent identity between two amino acid or nucleotide sequences can be determined using the algorithm of E. Meyers and W. Miller ((1989) CABIOS, 4:11-17) which has been incorporated into the ALIGN program (version 2.0), using a PAM120 weight residue table, a gap length penalty of 12 and a gap penalty of 4.

The nucleic acid and protein sequences described herein can be used as a “query sequence” to perform a search against public databases to, for example, identify other family members or related sequences. Such searches can be performed using the NBLAST and XBLAST programs (version 2.0) of Altschul, et al. (1990) J. Mol. Biol. 215:403-10. BLAST nucleotide searches can be performed with the NBLAST program, score=100, wordlength=12 to obtain nucleotide sequences homologous to a nucleic acid as described herein. BLAST protein searches can be performed with the XBLAST program, score=50, wordlength=3 to obtain amino acid sequences homologous to protein molecules described herein. To obtain gapped alignments for comparison purposes, Gapped BLAST can be utilized as described in Altschul et al., (1997) Nucleic Acids Res. 25:3389-3402. When utilizing BLAST and gapped BLAST programs, the default parameters of the respective programs (e.g., XBLAST and NBLAST) can be used. See www.ncbi.nlm.nih.gov.

As used herein, the term “hybridizes under low stringency, medium stringency, high stringency, or very high stringency conditions” describes conditions for hybridization and washing. Guidance for performing hybridization reactions can be found in Current Protocols in Molecular Biology, John Wiley & Sons, N.Y. (1989), 6.3.1-6.3.6, which is incorporated by reference. Aqueous and nonaqueous methods are described in that reference and either can be used. Specific hybridization conditions referred to herein are as follows: 1) low stringency hybridization conditions in 6× sodium chloride/sodium citrate (SSC) at about 45° C., followed by two washes in 0.2×SSC, 0.1% SDS at least at 50° C. (the temperature of the washes can be increased to 55° C. for low stringency conditions); 2) medium stringency hybridization conditions in 6×SSC at about 45° C., followed by one or more washes in 0.2×SSC, 0.1% SDS at 60° C.; 3) high stringency hybridization conditions in 6×SSC at about 45° C., followed by one or more washes in 0.2×SSC, 0.1% SDS at 65° C.; and preferably 4) very high stringency hybridization conditions are 0.5M sodium phosphate, 7% SDS at 65° C., followed by one or more washes at 0.2×SSC, 1% SDS at 65° C. Very high stringency conditions 4) are suitable conditions and the ones that should be used unless otherwise specified.

It is understood that the molecules described herein may have additional conservative or non-essential amino acid substitutions, which do not have a substantial effect on their functions.

The term “amino acid” is intended to embrace all molecules, whether natural or synthetic, which include both an amino functionality and an acid functionality and capable of being included in a polymer of naturally-occurring amino acids. Exemplary amino acids include naturally-occurring amino acids; analogs, derivatives and congeners thereof; amino acid analogs having variant side chains; and all stereoisomers of any of any of the foregoing. As used herein the term “amino acid” includes both the D- or L-optical isomers and peptidomimetics.

A “conservative amino acid substitution” is one in which the amino acid residue is replaced with an amino acid residue having a similar side chain Families of amino acid residues having similar side chains have been defined in the art. These families include amino acids with basic side chains (e.g., lysine, arginine, histidine), acidic side chains (e.g., aspartic acid, glutamic acid), uncharged polar side chains (e.g., glycine, asparagine, glutamine, serine, threonine, tyrosine, cysteine), nonpolar side chains (e.g., alanine, valine, leucine, isoleucine, proline, phenylalanine, methionine, tryptophan), beta-branched side chains (e.g., threonine, valine, isoleucine) and aromatic side chains (e.g., tyrosine, phenylalanine, tryptophan, histidine).

The terms “polypeptide,” “peptide” and “protein” (if single chain) are used interchangeably herein to refer to polymers of amino acids of any length. The polymer may be linear or branched, it may comprise modified amino acids, and it may be interrupted by non-amino acids. The terms also encompass an amino acid polymer that has been modified; for example, disulfide bond formation, glycosylation, lipidation, acetylation, phosphorylation, or any other manipulation, such as conjugation with a labeling component. The polypeptide can be isolated from natural sources, can be a produced by recombinant techniques from a eukaryotic or prokaryotic host, or can be a product of synthetic procedures.

The terms “nucleic acid,” “nucleic acid sequence,” “nucleotide sequence,” or “polynucleotide sequence,” and “polynucleotide” are used interchangeably. They refer to a polymeric form of nucleotides of any length, either deoxyribonucleotides or ribonucleotides, or analogs thereof. The polynucleotide may be either single-stranded or double-stranded, and if single-stranded may be the coding strand or non-coding (antisense) strand. A polynucleotide may comprise modified nucleotides, such as methylated nucleotides and nucleotide analogs. The sequence of nucleotides may be interrupted by non-nucleotide components. A polynucleotide may be further modified after polymerization, such as by conjugation with a labeling component. The nucleic acid may be a recombinant polynucleotide, or a polynucleotide of genomic, cDNA, semisynthetic, or synthetic origin which either does not occur in nature or is linked to another polynucleotide in a non-natural arrangement.

The term “isolated,” as used herein, refers to material that is removed from its original or native environment (e.g., the natural environment if it is naturally occurring). For example, a naturally-occurring polynucleotide or polypeptide present in a living animal is not isolated, but the same polynucleotide or polypeptide, separated by human intervention from some or all of the co-existing materials in the natural system, is isolated. Such polynucleotides could be part of a vector and/or such polynucleotides or polypeptides could be part of a composition, and still be isolated in that such vector or composition is not part of the environment in which it is found in nature.

As used herein, the term “treat,” e.g., a bacterial infection or related disorder, means that a subject (e.g., a human) who has a bacterial infection or related disorder, and/or experiences a symptom of a bacterial infection or related disorder, will, in an embodiment, suffer less a severe symptom and/or recover faster when an antibody molecule, ADC, or antimicrobial peptide is administered than if the antibody molecule, ADC, or antimicrobial peptide were never administered. In an embodiment, when an infection or related disorder is treated, an assay to detect bacteria in the subject will detect fewer bacteria after effective treatment for the infection or disorder. For example, a diagnostic assay using an antibody molecule or ADC, such as an antibody molecule or ADC described herein, will detect fewer or no bacteria in a biological sample of a subject after administration of an antibody molecule, ADC, or antimicrobial peptide for the effective treatment of the infection or disorder. Other assays, such as PCR (e.g., qPCR) can also be used to monitor treatment in a patient, to detect the presence, e.g., decreased presence (or absence) after treatment of bacterial infection or disorder in the subject. Treatment can, e.g., partially or completely alleviate, ameliorate, relieve, inhibit, or reduce the severity of, and/or reduce incidence and optionally, delay onset of, one or more manifestations of the effects or symptoms, features, and/or causes of a particular infection, disease, disorder, and/or condition (e.g., a bacterial infection). In an embodiment, treatment is of a subject who does not exhibit certain signs of the relevant infection, disease, disorder and/or condition and/or of a subject who exhibits only early signs of the infection, disease, disorder, and/or condition. In an embodiment, treatment is of a subject who exhibits one or more established signs of the relevant infection, disease, disorder and/or condition. In an embodiment, treatment is of a subject diagnosed as suffering from a bacterial infection or related disorder.

As used herein, the term “prevent,” e.g., a bacterial infection, means that a subject (e.g., a human) is less likely to have a bacterial infection if the subject receives the antibody molecule, ADC, or antimicrobial peptide prior to (e.g., 1 day, 2 days, 1 week, 2 weeks, 3 weeks, or 1 month of more) being exposed to the bacteria that cause the infection.

As used herein, the term “minimum inhibitory concentration” or “MIC” refers to the lowest concentration of an antimicrobial agent, e.g., an antibody molecule, ADC, or antimicrobial peptide, that will inhibit the growth (e.g., visible growth) of a bacterium, e.g., after incubation (e.g., overnight incubation). Methods for determining minimum inhibitory concentration or MIC are described, e.g., in Andrews, J. Antimicrob. Chemother. 2001; 48 Suppl 1:5-16 (Erratum in J. Antimicrob. Chemother. 2002; 49(6):1049). For example, MIC can be determined by using the following procedure: preparation of antibiotic stock solution, preparation of antibiotic dilution range, preparation of agar dilution plates, preparation of inoculum, inoculation, incubation, and reading and interpreting results. MICs can also be determined by agar dilution or broth microdilution, usually following the guidelines of a reference body such as the Clinical & Laboratory Standards Institute (CLSI), British Society for Antimicrobial Chemotherapy (BSAC), or European Committee on Antimicrobial Susceptibility Testing (EUCAST). In an embodiment, the MIC is the lowest concentration of an antimicrobial agent, e.g., an antibody molecule, ADC, or antimicrobial peptide, that inhibits growth of a bacterium, by at least 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 95%. In an embodiment, the MIC is the lowest concentration of an antimicrobial agent, e.g., an antibody molecule, ADC, or antimicrobial peptide, that inhibits growth of a bacterium, by at least 80%. Exemplary method for determining MIC is also described in Example 2.

As used herein, the term “minimum bactericidal concentration” or “MBC” refers to the lowest concentration of an antimicrobial agent, e.g., an antibody molecule, ADC, or antimicrobial peptide, required to kill a particular bacterium. In an embodiment, minimum bactericidal concentration or MBC can be determined from broth dilution minimum inhibitory concentration (MIC) tests by subculturing to agar plates that do not contain the test agent. In an embodiment, the MBC is identified by determining the lowest concentration of antimicrobial agent that reduces the viability of the initial bacterial inoculum by >99.9%. In an embodiment, antimicrobial agents are usually regarded as bactericidal if the MBC is no more than four times the MIC (French, J Antimicrob Chemother. 2006; 58(6):1107-1117).

Various aspects of the compositions and methods herein are described in further detail below. Additional definitions are set out throughout the specification.

Lipopolysaccharides

Disclosed herein are antibody molecules and antibody molecule-drug conjugates (ADCs) that can bind to lipopolysaccharides (LPS), e.g., on the outer membrane of Gram-negative bacteria. In an embodiment, the antibody molecule or ADC binds to a core pentasaccharide region of the LPS. Without wishing to be bound by theory, it is believed that in an embodiment, a core LPS region is targeted, at least in part, because it has one or more of the following properties: high density, conserved within species, accessible, or essential for adhesion (Raetz and Whitfield Annu. Rev. Biochem. 2002; 71: 635-700; de Kievit and Lam J Bacteriol. 1994; 176(23):7129-39; Schmengler et al. Eur J Cell Biol. 2010; 89(1):25-33; Pier et al. Am J Respir Crit Care Med. 1996; 154(4 Pt 2):S175-82).

LPS, also known as lipoglycans or endotoxin, are large molecules including a lipid and a polysaccharide composed of O-antigen, outer core and inner core joined by a covalent bond. LPS is found, e.g., in the outer membrane of Gram-negative bacteria, which may elicit strong immune responses in animals. LPS contributes to the structural integrity of the bacteria and protects the membrane from certain kinds of chemical attack. It also increases the negative charge of the cell membrane and helps stabilize the overall membrane structure. LPS may induce a strong immune response in animals. It has also been implicated in non-pathogenic aspects of bacterial ecology, including surface adhesion, bacteriophage sensitivity, and interactions with predators such as amoebae. LPS is required for the proper conformation of omptin activity; however, smooth LPS will sterically hinder omptins. As LPS is a major component of the outer membrane of Gram-negative bacteria, mutation or removal of LPS can result in death of Gram-negative bacteria.

LPS comprises three parts: O antigen (or O polysaccharide), Core oligosaccharide, and Lipid A.

O antigen, also known as O polysaccharide or O side-chain, is a repetitive glycan polymer contained within an LPS of the bacteria. The O antigen is attached to the core oligosaccharide, and comprises the outermost domain of the LPS molecule. The composition of the O chain varies from strain to strain. For example, there are over 160 different O antigen structures produced by different E. coli strains (Raetz and Whitfield Annu. Rev. Biochem. 2002; 71: 635-700). The presence or absence of O chains determines whether the LPS is considered rough or smooth. Full-length O-chains would render the LPS smooth, whereas the absence or reduction of O-chains would make the LPS rough (Rittig et al. J. Leukoc. Biol. 2003; 74 (6): 1045-55). Bacteria with rough LPS usually have more penetrable cell membranes to hydrophobic antibiotics, since a rough LPS is more hydrophobic (Tsujimoto et al. J. Infect. Chemother. 1999, 5 (4): 196-200. O antigen is exposed on the very outer surface of the bacterial cell, and, can be targeted for recognition by host antibodies.

The Core oligosaccharide or core domain contains an oligosaccharide component that attaches directly to lipid A and commonly contains sugars such as heptose (Hep) and 3-deoxy-D-mannooctulosonic acid (also known as Kdo or keto-deoxyoctulosonate) (Hershberger and Binkley, J. Biol. Chem. 1968; 243 (7): 1578-1584). A typical core pentasaccharide or core pentasaccharide region includes, e.g., two Kdo residues and one, two or three Hep residues. The composition and structure of core pentasaccharides from exemplary bacteria are shown in FIG. 1. The LPS Cores of many bacteria also contain non-carbohydrate components, such as phosphate, amino acids, and ethanolamine substituents.

A LPS core can include an inner core and an outer core.

The “base” of the inner core is 1-3 Kdo residues. The last Kdo is often modified with a phosphate or ethanolamine group. From the Kdo residues, there are attached 2-3 heptose residues (e.g., L-glycero-D-mannoheptulose) that are usually phosphorylated. These Kdo and heptose residues form the “inner core.” The ketosidic bond between Kdo and lipid A (a2→6) is especially susceptible to acid cleavage. The lipid and polysaccharide portions of LPS can be separated by a weak acid treatment. An LPS molecule that includes only a lipid A and an inner core (or less) is referred to as “deep-rough LPS.”

The outer core is made of hexose residues that are attached to the last heptose residue in the inner core. Hexoses often found in the outer core include, e.g., D-glucose, D-mannose, or D-galactose. There is usually at least three hexoses bound β1→3, with the O antigen being ligated to the third hexose. Other hexoses are often found attached to the outer core, branching from the main oligomer. LPS that include lipid A and a complete core oligosaccharide (inner and outer) is referred to as “rough LPS.”

Lipid A is, in some circumstances, a phosphorylated glucosamine disaccharide decorated with multiple fatty acids. These hydrophobic fatty acid chains anchor the LPS into the bacterial membrane, and the rest of the LPS projects from the cell surface. The lipid A domain is responsible for much of the toxicity of Gram-negative bacteria. When bacterial cells are lysed by the immune system, fragments of membrane containing lipid A are released into the circulation, causing fever, diarrhea, and possible fatal endotoxic shock (also called septic shock).

In an embodiment, a core glycan of P. aeruginosa is targeted. Without wishing to be bound by theory, it is believed that in an embodiment, core glycans of P. aeruginosa are conserved across strains, are accessible in vivo, and/or have limited phase variation/resistance elements.

In an embodiment, the antibody molecule or ADC binds to phosphorylated LPS, e.g., a phosphorylated core pentasaccharide region of the LPS. In an embodiment, the antibody molecule or ADC described herein binds to one or more (e.g., two or three) phosphate groups in the core LPS region of P. aeruginosa. In an embodiment, the phosphate group is bound by an Arginine residue in the antibody molecule or ADC. In an embodiment, the phosphate group is inhibited or neutralized by an Arginine residue in the antibody molecule or ADC. In an embodiment, the antibody molecule or ADC binds to at least three phosphate groups (e.g., Hep2,4,6-PO₄) in the core LPS region of P. aeruginosa, each of which is bound, inhibited, or neutralized by an Arginine residue (e.g., R100, R101, or R103) in the antibody molecule or ADC. For example, the H3 and L3 cavity of the antibody molecule can accommodate a monosaccharide.

Antibody Molecules

Disclosed herein are antibody molecules that bind to bacteria (e.g., Gram-negative bacteria) and/or lipopolysaccharides (LPS). The antibody molecule-drug conjugates (ADCs) disclosed herein can include an antibody molecule disclosed herein.

As used herein, the term “antibody molecule” refers to a protein, e.g., an immunoglobulin chain or a fragment thereof, comprising at least one immunoglobulin variable domain sequence. The term “antibody molecule” includes, for example, full-length, mature antibodies and antigen-binding fragments of an antibody. For example, an antibody molecule can include a heavy (H) chain variable domain sequence (abbreviated herein as VH), and a light (L) chain variable domain sequence (abbreviated herein as VL). In another example, an antibody molecule includes two heavy (H) chain variable domain sequences and two light (L) chain variable domain sequence, thereby forming two antigen binding sites, such as Fab, Fab′, F(ab′)2, Fc, Fd, Fd′, Fv, single chain antibodies (scFv for example), single variable domain antibodies, diabodies (Dab) (bivalent and bispecific), and chimeric (e.g., humanized) antibodies, which may be produced by the modification of whole antibodies or those synthesized de novo using recombinant DNA technologies. These functional antibody fragments retain the ability to selectively bind with their respective antigen or receptor. Antibodies and antibody fragments can be from any class of antibodies including, but not limited to, IgG, IgA, IgM, IgD, and IgE, and from any subclass (e.g., IgG1, IgG2, IgG3, and IgG4) of antibodies. The antibody molecules can be monoclonal or polyclonal. The antibody molecule can also be a human, humanized, CDR-grafted, or in vitro generated antibody. The antibody molecule can have a heavy chain constant region chosen from, e.g., IgG1, IgG2, IgG3, or IgG4. The antibody molecule can also have a light chain chosen from, e.g., kappa or lambda. The term “immunoglobulin” (Ig) is used interchangeably with the term “antibody” herein.

Examples of antigen-binding fragments include: (i) a Fab fragment, a monovalent fragment consisting of the VL, VH, CL and CH1 domains; (ii) a F(ab′)2 fragment, a bivalent fragment comprising two Fab fragments linked by a disulfide bridge at the hinge region; (iii) a Fd fragment consisting of the VH and CH1 domains; (iv) a Fv fragment consisting of the VL and VH domains of a single arm of an antibody, (v) a diabody (dAb) fragment, which consists of a VH domain; (vi) a camelid or camelized variable domain; (vii) a single chain Fv (scFv), see e.g., Bird et al. (1988) Science 242:423-426; and Huston et al. (1988) Proc. Natl. Acad. Sci. USA 85:5879-5883); (viii) a single domain antibody. These antibody fragments may be obtained using any suitable method, including several conventional techniques known to those with skill in the art, and the fragments can be screened for utility in the same manner as are intact antibodies.

The term “antibody” includes intact molecules as well as functional fragments thereof. Constant regions of the antibodies can be altered, e.g., mutated, to modify the properties of the antibody (e.g., to increase or decrease one or more of: Fc receptor binding, antibody glycosylation, the number of cysteine residues, effector cell function, or complement function).

The antibody molecule can be a single chain antibody. A single-chain antibody (scFv) may be engineered (see, for example, Colcher, D. et al. (1999) Ann NY Acad Sci 880:263-80; and Reiter, Y. (1996) Clin Cancer Res 2:245-52). The single chain antibody can be dimerized or multimerized to generate multivalent antibodies having specificities for different epitopes of the same target protein.

The antibody molecules disclosed herein can also be single domain antibodies. Single domain antibodies can include antibodies whose complementary determining regions are part of a single domain polypeptide. Examples include, but are not limited to, heavy chain antibodies, antibodies naturally devoid of light chains, single domain antibodies derived from conventional 4-chain antibodies, engineered antibodies and single domain scaffolds other than those derived from antibodies. Single domain antibodies may be any of the art, or any future single domain antibodies. Single domain antibodies may be derived from any species including, but not limited to mouse, human, camel, llama, fish, shark, goat, rabbit, and bovine. According to some aspects, a single domain antibody is a naturally occurring single domain antibody known as heavy chain antibody devoid of light chains. Such single domain antibodies are disclosed in International Publication No. WO 94/04678, for example. For clarity reasons, this variable domain derived from a heavy chain antibody naturally devoid of light chain is known herein as a VHH or nanobody to distinguish it from the conventional VH of four chain immunoglobulins. Such a VHH molecule can be derived from antibodies raised in Camelidae species, for example in camel, llama, dromedary, alpaca and guanaco. Other species besides Camelidae may produce heavy chain antibodies naturally devoid of light chain; such VHHs are also contemplated.

The VH and VL regions can be subdivided into regions of hypervariability, termed “complementarity determining regions” (CDR), interspersed with regions that are more conserved, termed “framework regions” (FR or FW). The terms “complementarity determining region,” and “CDR,” as used herein refer to the sequences of amino acids within antibody variable regions which confer antigen specificity and binding affinity. As used herein, the terms “framework,” “FW” and “FR” are used interchangeably.

The extent of the framework region and CDRs has been precisely defined by a number of methods (see, Kabat, E. A., et al. (1991) Sequences of Proteins of Immunological Interest, Fifth Edition, U.S. Department of Health and Human Services, NIH Publication No. 91-3242; Chothia, C. et al. (1987) J. Mol. Biol. 196:901-917; and the AbM definition used by Oxford Molecular's AbM antibody modeling software. See, generally, e.g., Protein Sequence and Structure Analysis of Antibody Variable Domains. In: Antibody Engineering Lab Manual (Ed.: Duebel, S. and Kontermann, R., Springer-Verlag, Heidelberg). In an embodiment, the following definitions are used: AbM definition of CDR1 of the heavy chain variable domain and Kabat definitions for the other CDRs. In an embodiment, Kabat definitions are used for all CDRs. In addition, embodiments described with respect to Kabat or AbM CDRs may also be implemented using Chothia hypervariable loops. Each VH and VL typically includes three CDRs and four FRs, arranged from amino-terminus to carboxy-terminus in the following order: FR1, CDR1, FR2, CDR2, FR3, CDR3, and FR4.

As used herein, an “immunoglobulin variable domain sequence” refers to an amino acid sequence which can form the structure of an immunoglobulin variable domain. For example, the sequence may include all or part of the amino acid sequence of a naturally-occurring variable domain. For example, the sequence may or may not include one, two, or more N- or C-terminal amino acids, or may include other alterations that are compatible with formation of the protein structure.

The term “antigen-binding region” refers to the part of an antibody molecule that comprises determinants that form an interface that binds to an antigen, e.g., lipopolysaccharide (LPS), or an epitope thereof. With respect to proteins (or protein mimetics), the antigen-binding region typically includes one or more loops (of at least, e.g., four amino acids or amino acid mimics) that form an interface that binds to the antigen, e.g., LPS. Typically, the antigen-binding region of an antibody molecule includes at least one or two CDRs and/or hypervariable loops, or more typically at least three, four, five or six CDRs and/or hypervariable loops.

The terms “compete” or “cross-compete” are used interchangeably herein to refer to the ability of an antibody molecule to interfere with binding of an anti-LPS antibody molecule, e.g., an anti-LPS antibody molecule provided herein, to a target, e.g., LPS on a Gram-negative bacterium. The interference with binding can be direct or indirect (e.g., through an allosteric modulation of the antibody molecule or the target). The extent to which an antibody molecule is able to interfere with the binding of another antibody molecule to the target, and therefore whether it can be said to compete, can be determined using a competition binding assay, for example, a FACS assay, an ELISA, an SPR assay, or an OCTET® assay (ForteBio). In an embodiment, a competition binding assay is a quantitative competition assay. In an embodiment, a first anti-LPS antibody molecule is said to compete for binding to the target with a second anti-LPS antibody molecule when the binding of the first antibody molecule to the target is reduced by 10% or more, e.g., 20% or more, 30% or more, 40% or more, 50% or more, 55% or more, 60% or more, 65% or more, 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 95% or more, 98% or more, 99% or more in a competition binding assay (e.g., a competition assay described herein).

The terms “monoclonal antibody” or “monoclonal antibody composition” as used herein refer to a preparation of antibody molecules of single molecular composition. A monoclonal antibody composition displays a single binding specificity and affinity for a particular epitope. A monoclonal antibody can be made by hybridoma technology or by methods that do not use hybridoma technology (e.g., recombinant methods).

An “effectively human” protein is a protein that does not evoke a neutralizing antibody response, e.g., the human anti-murine antibody (HAMA) response. HAMA can be problematic in a number of circumstances, e.g., if the antibody molecule is administered repeatedly, e.g., in treatment of a chronic or recurrent disease condition. A HAMA response can make repeated antibody administration potentially ineffective because of an increased antibody clearance from the serum (see, e.g., Saleh et al., Cancer Immunol. Immunother., 32:180-190 (1990)) and also because of potential allergic reactions (see, e.g., LoBuglio et al., Hybridoma, 5:5117-5123 (1986)).

The antibody molecule can be a polyclonal or a monoclonal antibody. In some embodiments, the antibody can be recombinantly produced, e.g., produced by any suitable phage display or combinatorial methods.

Various phage display and combinatorial methods for generating antibodies are known in the art (as described in, e.g., Ladner et al. U.S. Pat. No. 5,223,409; Kang et al. International Publication No. WO 92/18619; Dower et al. International Publication No. WO 91/17271; Winter et al. International Publication WO 92/20791; Markland et al. International Publication No. WO 92/15679; Breitling et al. International Publication WO 93/01288; McCafferty et al. International Publication No. WO 92/01047; Garrard et al. International Publication No. WO 92/09690; Ladner et al. International Publication No. WO 90/02809; Fuchs et al. (1991) Bio/Technology 9:1370-1372; Hay et al. (1992) Hum Antibod Hybridomas 3:81-85; Huse et al. (1989) Science 246:1275-1281; Griffths et al. (1993) EMBO J 12:725-734; Hawkins et al. (1992) J Mol Biol 226:889-896; Clackson et al. (1991) Nature 352:624-628; Gram et al. (1992) PNAS 89:3576-3580; Garrad et al. (1991) Bio/Technology 9:1373-1377; Hoogenboom et al. (1991) Nuc Acid Res 19:4133-4137; and Barbas et al. (1991) PNAS 88:7978-7982, the contents of all of which are incorporated by reference herein).

In an embodiment, the antibody molecule is a fully human antibody (e.g., an antibody made in a mouse which has been genetically engineered to produce an antibody from a human immunoglobulin sequence), or a non-human antibody, e.g., a rodent (mouse or rat), goat, primate (e.g., monkey), camel antibody. In an embodiment, the non-human antibody is a rodent (mouse or rat antibody). Methods of producing rodent antibodies are known in the art.

Human monoclonal antibodies can be generated using transgenic mice carrying the human immunoglobulin genes rather than the mouse system. Splenocytes from these transgenic mice immunized with the antigen of interest are used to produce hybridomas that secrete human mAbs with specific affinities for epitopes from a human protein (see, e.g., Wood et al. International Application WO 91/00906, Kucherlapati et al. PCT publication WO 91/10741; Lonberg et al. International Application WO 92/03918; Kay et al. International Application 92/03917; Lonberg, N. et al. 1994 Nature 368:856-859; Green, L. L. et al. 1994 Nature Genet. 7:13-21; Morrison, S. L. et al. 1994 Proc. Natl. Acad. Sci. USA 81:6851-6855; Bruggeman et al. 1993 Year Immunol 7:33-40; Tuaillon et al. 1993 PNAS 90:3720-3724; Bruggeman et al. 1991 Eur J Immunol 21:1323-1326).

An antibody can be one in which the variable region, or a portion thereof, e.g., the CDRs, are generated in a non-human organism, e.g., a rat or mouse. Chimeric, CDR-grafted, and humanized antibodies are within the invention. Antibodies generated in a non-human organism, e.g., a rat or mouse, and then modified, e.g., in the variable framework or constant region, to decrease antigenicity in a human are within the invention.

Chimeric antibodies can be produced by any suitable recombinant DNA technique. Several are known in the art (see Robinson et al., International Patent Publication PCT/US86/02269; Akira, et al., European Patent Application 184,187; Taniguchi, M., European Patent Application 171,496; Morrison et al., European Patent Application 173,494; Neuberger et al., International Application WO 86/01533; Cabilly et al. U.S. Pat. No. 4,816,567; Cabilly et al., European Patent Application 125,023; Better et al. (1988 Science 240:1041-1043); Liu et al. (1987) PNAS 84:3439-3443; Liu et al., 1987, J. Immunol. 139:3521-3526; Sun et al. (1987) PNAS 84:214-218; Nishimura et al., 1987, Canc. Res. 47:999-1005; Wood et al. (1985) Nature 314:446-449; and Shaw et al., 1988, J. Natl Cancer Inst. 80:1553-1559).

A humanized or CDR-grafted antibody will have at least one or two but generally all three recipient CDRs (of heavy and or light immunoglobulin chains) replaced with a donor CDR. The antibody may be replaced with at least a portion of a non-human CDR or only some of the CDRs may be replaced with non-human CDRs. It is only necessary to replace the number of CDRs required for binding of the humanized antibody to lipopolysaccharide. In an embodiment, the donor will be a rodent antibody, e.g., a rat or mouse antibody, and the recipient will be a human framework or a human consensus framework. Typically, the immunoglobulin providing the CDRs is called the “donor” and the immunoglobulin providing the framework is called the “acceptor.” In some embodiments, the donor immunoglobulin is a non-human (e.g., rodent). The acceptor framework is typically a naturally-occurring (e.g., a human) framework or a consensus framework, or a sequence about 85% or higher, e.g., 90%, 95%, 99% or higher identical thereto.

As used herein, the term “consensus sequence” refers to the sequence formed from the most frequently occurring amino acids (or nucleotides) in a family of related sequences (See e.g., Winnaker, From Genes to Clones (Verlagsgesellschaft, Weinheim, Germany 1987). In a family of proteins, each position in the consensus sequence is occupied by the amino acid occurring most frequently at that position in the family. If two amino acids occur equally frequently, either can be included in the consensus sequence. A “consensus framework” refers to the framework region in the consensus immunoglobulin sequence.

An antibody can be humanized by any suitable method, and several such methods known in the art (see e.g., Morrison, S. L., 1985, Science 229:1202-1207, by Oi et al., 1986, BioTechniques 4:214, and by Queen et al. U.S. Pat. Nos. 5,585,089, 5,693,761 and 5,693,762, the contents of all of which are hereby incorporated by reference).

Humanized or CDR-grafted antibodies can be produced by CDR-grafting or CDR substitution, wherein one, two, or all CDRs of an immunoglobulin chain can be replaced. See e.g., U.S. Pat. No. 5,225,539; Jones et al. 1986 Nature 321:552-525; Verhoeyan et al. 1988 Science 239:1534; Beidler et al. 1988 J. Immunol. 141:4053-4060; Winter U.S. Pat. No. 5,225,539, the contents of all of which are hereby expressly incorporated by reference. Winter describes a CDR-grafting method which may be used to prepare humanized antibodies (UK Patent Application GB 2188638A, filed on Mar. 26, 1987; Winter U.S. Pat. No. 5,225,539), the contents of which is expressly incorporated by reference.

Also provided are humanized antibodies in which specific amino acids have been substituted, deleted or added. Criteria for selecting amino acids from the donor are described in, e.g., U.S. Pat. No. 5,585,089, e.g., columns 12-16 of U.S. Pat. No. 5,585,089, the contents of which are hereby incorporated by reference. Other techniques for humanizing antibodies are described in Padlan et al. EP 519596 A1, published on Dec. 23, 1992.

In an embodiment, the antibody molecule has a heavy chain constant region chosen from, e.g., the heavy chain constant regions of IgG1, IgG2, IgG3, IgG4, IgM, IgA1, IgA2, IgD, and IgE; particularly, chosen from, e.g., the heavy chain constant regions (e.g., the human heavy chain constant regions) of IgG1, IgG2, IgG3, and IgG4. In another embodiment, the antibody molecule has a light chain constant region chosen from, e.g., the light chain constant regions (e.g., the human light chain constant regions) of kappa or lambda. The constant region can be altered, e.g., mutated, to modify the properties of the antibody molecule (e.g., to increase or decrease one or more of: Fc receptor binding, antibody glycosylation, the number of cysteine residues, effector cell function, and/or complement function). In an embodiment, the antibody molecule has effector function and can fix complement. In another embodiment, the antibody molecule does not recruit effector cells or fix complement. In certain embodiments, the antibody molecule has reduced or no ability to bind an Fc receptor. For example, it may be an isotype or subtype, fragment or other mutant, which does not support binding to an Fc receptor, e.g., it has a mutagenized or deleted Fc receptor binding region. In an embodiment, the antibody molecule comprises an Fc region that is altered to increase an ADCC activity. In an embodiment, the ADCC activity is increased by 10-fold or more, e.g., 25-fold or more, 50-fold or more, 100-fold or more, 200-fold or more, 400-fold or more, 600-fold or more, 800-fold or more, or 1000-fold or more, e.g., between 100-fold and 1000-fold or between 250-fold and 750-fold. In an embodiment, the antibody molecule comprises an Fc region that is altered to modulate engagement with an Fcγ receptor or an opsonophagocytosis activity. In an embodiment, the antibody molecule comprises an Fc region that is altered to modulate engagement with an FcRn receptor.

In an embodiment, a constant region of the antibody molecule is altered. Methods for altering an antibody constant region are known in the art. Antibody molecules with altered function, e.g. altered affinity for an effector ligand, such as FcR on a cell, or the Cl component of complement can be produced by replacing at least one amino acid residue in the constant portion of the antibody with a different residue (see e.g., EP 388,151 A1, U.S. Pat. Nos. 5,624,821 and 5,648,260, the contents of all of which are hereby incorporated by reference) Amino acid mutations which stabilize antibody structure, such as S228P (EU nomenclature, S241P in Kabat nomenclature) in human IgG4 are also contemplated. Similar type of alterations could be described which if applied to the murine, or other species immunoglobulin would reduce or eliminate these functions.

In an embodiment, the only amino acids in the antibody molecule are canonical amino acids. In an embodiment, the antibody molecule comprises naturally-occurring amino acids; analogs, derivatives and congeners thereof; amino acid analogs having variant side chains; and/or all stereoisomers of any of any of the foregoing. The antibody molecule may comprise the D- or L-optical isomers of amino acids and peptidomimetics.

A polypeptide of an antibody molecule described herein may be linear or branched, it may comprise modified amino acids, and it may be interrupted by non-amino acids. The antibody molecule may also be modified; for example, by disulfide bond formation, glycosylation, lipidation, acetylation, phosphorylation, or any other manipulation, such as conjugation with a labeling component. The polypeptide can be isolated from natural sources, can be a produced by recombinant techniques from a eukaryotic or prokaryotic host, or can be a product of synthetic procedures.

The antibody molecule described herein can be used alone in unconjugated form, or can be bound to a substance, e.g., a toxin or moiety (e.g., a therapeutic drug (e.g., an antibiotic); a compound emitting radiation; molecules of plant, fungal, or bacterial origin; or a biological protein (e.g., a protein toxin) or particle (e.g., a recombinant viral particle, e.g., via a viral coat protein). For example, the anti-LPS antibody can be coupled to a radioactive isotope such as an α-, β-, or γ-emitter, or a β- and γ-emitter.

An antibody molecule can be derivatized or linked to another functional molecule (e.g., another peptide or protein). As used herein, a “derivatized” antibody molecule is one that has been modified. Methods of derivatization include but are not limited to the addition of a fluorescent moiety, a radionucleotide, a toxin, an enzyme or an affinity ligand such as biotin. Accordingly, the antibody molecules are intended to include derivatized and otherwise modified forms of the antibodies described herein, including immunoadhesion molecules. For example, an antibody molecule can be functionally linked (by chemical coupling, genetic fusion, noncovalent association or otherwise) to one or more other molecular entities, such as another antibody (e.g., a bispecific antibody or a diabody), a detectable agent, a toxin, a pharmaceutical agent, and/or a protein or peptide that can mediate association of the antibody or antibody portion with another molecule (such as a streptavidin core region or a polyhistidine tag).

Some types of derivatized antibody molecule are produced by crosslinking two or more antibodies (of the same type or of different types, e.g., to create bispecific antibodies). Suitable crosslinkers include those that are heterobifunctional, having two distinctly reactive groups separated by an appropriate spacer (e.g., m-maleimidobenzoyl-N-hydroxysuccinimide ester) or homobifunctional (e.g., disuccinimidyl suberate). Such linkers are available from Pierce Chemical Company, Rockford, Ill.

Useful detectable agents with which an anti-LPS antibody molecule may be derivatized (or labeled) to include fluorescent compounds, various enzymes, prosthetic groups, luminescent materials, bioluminescent materials, fluorescent emitting metal atoms, e.g., europium (Eu), and other anthanides, and radioactive materials (described below). Exemplary fluorescent detectable agents include fluorescein, fluorescein isothiocyanate, rhodamine, 5dimethylamine-1-napthalenesulfonyl chloride, phycoerythrin and the like. An antibody may also be derivatized with detectable enzymes, such as alkaline phosphatase, horseradish peroxidase, β-galactosidase, acetylcholinesterase, glucose oxidase and the like. When an antibody is derivatized with a detectable enzyme, it is detected by adding additional reagents that the enzyme uses to produce a detectable reaction product. For example, when the detectable agent horseradish peroxidase is present, the addition of hydrogen peroxide and diaminobenzidine leads to a colored reaction product, which is detectable. An antibody molecule may also be derivatized with a prosthetic group (e.g., streptavidin/biotin and avidin/biotin). For example, an antibody may be derivatized with biotin, and detected through indirect measurement of avidin or streptavidin binding. Examples of suitable fluorescent materials include umbelliferone, fluorescein, fluorescein isothiocyanate, rhodamine, dichlorotriazinylamine fluorescein, dansyl chloride or phycoerythrin; an example of a luminescent material includes luminol; and examples of bioluminescent materials include luciferase, luciferin, and aequorin.

Labeled antibody molecule can be used, for example, diagnostically and/or experimentally in a number of contexts, including (i) to isolate a predetermined antigen by standard techniques, such as affinity chromatography or immunoprecipitation; (ii) to detect a predetermined antigen (e.g., in a cellular lysate or cell supernatant) in order to evaluate the abundance and pattern of expression of the protein; (iii) to monitor protein levels in tissue as part of a clinical testing procedure, e.g., to determine the efficacy of a given treatment regimen.

An antibody molecule may be conjugated to another molecular entity, typically a label or a therapeutic (e.g., antimicrobial (e.g., antibacterial or bactericidal), immunomodulatory, immunostimularoty, cytotoxic, or cytostatic) agent or moiety. Radioactive isotopes can be used in diagnostic or therapeutic applications. Radioactive isotopes that can be coupled to the antibody molecules include, but are not limited to α-, β-, or γ-emitters, or β- and γ-emitters. Such radioactive isotopes include, but are not limited to iodine (¹³¹I or ¹²⁵I), yttrium (⁹⁰Y), lutetium (¹⁷⁷Lu), actinium (²²⁵Ac), praseodymium, astatine (²¹¹At), rhenium (¹⁸⁶Re), bismuth (²¹²Bi or ²¹³Bi), indium (¹¹¹In), technetium (⁹⁹mTc), phosphorus (³²P), rhodium (¹⁸⁸Rh), sulfur (³⁵S), carbon (¹⁴C), tritium (³H), chromium (⁵¹Cr), chlorine (³⁶Cl), cobalt (⁵⁷Co or ⁵⁸Co), iron (⁵⁹Fe), selenium (⁷⁵Se), or gallium (⁶⁷Ga). Radioisotopes useful as therapeutic agents include yttrium (⁹⁰Y), lutetium (¹⁷⁷Lu), actinium (²²⁵Ac), praseodymium, astatine (²¹¹At), rhenium (¹⁸⁶Re), bismuth (²¹²Bi or ²¹³Bi), and rhodium (¹⁸⁸Rh). Radioisotopes useful as labels, e.g., for use in diagnostics, include iodine (¹³¹I or ¹²⁵I), indium (¹¹¹In), technetium (⁹⁹mTc), phosphorus (³²P), carbon (¹⁴C), and tritium (³H), or one or more of the therapeutic isotopes listed above.

The present disclosure provides radiolabeled antibody molecules and methods of labeling the same. In an embodiment, a method of labeling an antibody molecule is disclosed. The method includes contacting an antibody molecule, with a chelating agent, to thereby produce a conjugated antibody. The conjugated antibody is radiolabeled with a radioisotope, e.g., ¹¹¹Indium, ⁹⁰Yttrium and ¹⁷⁷Lutetium, to thereby produce a labeled antibody molecule.

As is discussed above, the antibody molecule can be conjugated to a therapeutic agent. Therapeutically active radioisotopes have already been mentioned. Examples of other therapeutic agents include antimicrobial (e.g., anti-bacterial) agents, e.g., antimicrobial peptides. In an embodiment, an antimicrobial peptide can be coupled (e.g., fused) to the antibody molecule, e.g., a heavy chain or light chain of the antibody molecule. In an embodiment, the antimicrobial peptide is coupled (e.g., fused) to the N-terminus of the heavy chain or light chain or a functional fragment thereof. In an embodiment, the antimicrobial peptide is coupled (e.g., fused) to the C-terminus of the heavy chain or light chain or a functional fragment thereof. In an embodiment, the antimicrobial peptide is coupled (e.g., fused) to a constant region or a portion thereof. In an embodiment, the heavy chain or light chain, or a portion thereof, and the antimicrobial peptide, forms a fusion polypeptide, e.g., encoded by an open reading frame (ORF). One or more antimicrobial peptides can be coupled (e.g., fused) to the antibody molecule. In an embodiment, at least two of the antimicrobial peptides are identical or substantially identical. In another embodiment, at least two of the antimicrobial peptides are different. In an embodiment, all of the antimicrobial peptides are identical or substantially identical.

In some aspects, this disclosure provides a method of making an antibody molecule disclosed herein. The method includes: providing an antigen, e.g., a bacteria (e.g., a Gram-negative bacteria) or LPS; obtaining an antibody molecule that specifically binds to the antigen; evaluating efficacy of the antibody molecule in modulating activity of the antigen and/or organism expressing the antigen, e.g., a bacterium (e.g., a Gram-negative bacterium). The method can further include administering the antibody molecule, including a derivative thereof (e.g., a humanized antibody molecule) to a subject, e.g., a human.

This disclosure provides an isolated nucleic acid molecule encoding the above antibody molecule, vectors and host cells thereof. The nucleic acid molecule includes, but is not limited to, RNA, genomic DNA and cDNA.

Exemplary sequences of antibody molecules are described in Tables 1, 2 and 8 below.

TABLE 1 Amino acid sequences of heavy chain variable regions (VHs), light chain variable regions (VLs), heavy chain CDRs (HCDRs), and light chain CDRs (LCDRs) of exemplary antibody molecules. Heavy and light chain CDRs defined according to Chothia system and Kabat system are shown. SEQ ID SEQ ID SEQ ID Antibody VH NO Chothia CDR NO Kabat CDR NO A001-25 EVQLQQSGPVLVKPGASVKMSCKASGYTFTDHYINWVKQSH   1 HCDR1 GYTFTDH  14 HCDR1 DHYIN  17 GKSLEWIGGIYPYHGITKYNRNFKDKATLTVDKSSSTAYME HCDR2 YPYHGI  15 HCDR2 GIYPYHGITKYNRNFKD  18 LNSLTSELSAVYYCASGGSRRYFDVWGTGTTVTVSS HCDR3 GGSRRYFDV  16 HCDR3 GGSRRYFDV  16 hWN01 EVQLVESGGGLVQPGGSLRLSCAASGFTFSDYYMTWVRQAP   2 HCDR1 GFTFSDY  19 HCDR1 DYYMT  22 GKGLEWVGLIRNKRNGDTAEYSASVKGRFTISRDDSKNSLY HCDR2 RNKRNGDT  20 HCDR2 LIRNKRNGDTAEYSASVKG  23 LQMNSLKTEDTAVYYCARQGRGYTLDYWGQGTLVTVSS HCDR3 QGRGYTLDY  21 HCDR3 QGRGYTLDY  21 hWNv1 EVQLVESGGGLVQPGGSLRLSCAASGFTFSDYWMTWVRQAP   3 HCDR1 GFTFSDY  19 HCDR1 DYWMT  27 GKGLEWVGLIRAKANGDTAEYSASVKGRFTISRDDSKNSLY HCDR2 RAKANGDT  25 HCDR2 LIRAKANGDTAEYSASVKG  28 LQMNSLKTEDTAVYYCARQGRGYTLDYWGQGTLVTVSS HCDR3 QGRGYTLDY  21 HCDR3 QGRGYTLDY  21 3E7 QVQLQQPGAELVKPGASVKMSCKASGYTFTSYWITWVKQRP   4 HCDR1 GYTFTSY  29 HCDR1 SYWIT  32 GQGLEWIGDIYPGSGSTNYNEKFKSKATLTVDTSSSTAYMQ HCDR2 YPGSGS  30 HCDR2 DIYPGSGSTNYNEKFKS  33 LSSLTSEDSAVYYCARGSYSLDYWGQGTTLTVSS HCDR3 GSYSLDY  31 HCDR3 GSYSLDY  31 3G1 EVQLQQSVAELVRPGASVKLSCTASGFNIKNTYMHWVKQRP   5 HCDR1 GFNIKNT  34 HCDR1 NTYMH  37 EQGLEWIGRIDPANGNTKYAPKFQGKATITADTSSNTAYLQ HCDR2 DPANGN  35 HCDR2 RIDPANGNTKYAPKFQG  38 LSSLTSEDTAIYYCAPSNYHAMDYWGQGTSVTVSS HCDR3 SNYHAMDY  36 HCDR3 SNYHAMDY  36 2C7 DVQLQESGPGLVKPSQSLSLTCSVTGYSITSGYYWNWIRQF   6 HCDR1 GYSITSGY  39 HCDR1 SGYYWN  42 PGNKLEWMGYISYDGSNNYNPSLKNRISITRDTSKNQFFLK HCDR2 SYDGS  40 HCDR2 YISYDGSNNYNPSLKN  43 LNSVTTEDTATYYCARWNGNYFDYWGQGTTLTVSS HCDR3 WNGNYFDY  41 HCDR3 WNGNYFDY  41 3D6 EVQLQQSGPVLVKPGASVKMSCKASGYTFTDYYMNWVKQSH   7 HCDR1 GYTFTDY  44 HCDR1 DYYMN  47 GKSLEWIGVINPYNGGTSYNQKFKGKATLTVDKSSSTAYME HCDR2 NPYNGG  45 HCDR2 VINPYNGGTSYNQKFKG  48 LNSLTSEDSAVYYCARTRQLGLRWFAYWGQGTLVTVSA HCDR3 TRQLGLRWFAY  46 HCDR3 TRQLGLRWFAY  46 mAb001 EVKLVESGGDLVKPGGSLRLSCAASEFTFSDYAMSWVRQTP 103 HCDR1 EFTFSDY 105 HCDR1 DYAMS 108 AKRLEWVAYISSDGDSTYYPDNIKGRFTISRDNAKNTLYLQ HCDR2 SSDGDS 106 HCDR2 YISSDGDSTYYPDNIKG 109 MNSLRSEDTAMYFCAREIRLRGYFDVWGAGTTVTVSS HCDR3 EIRLRGYFDV 107 HCDR3 EIRLRGYFDV 107 SEQ ID SEQ ID SEQ ID Antibody VL NO Chothia CDR NO Kabat CDR NO A001-25 DVVMTQTPLSLPVSLGDQASISCRSSQRLVHSNGNTYLHWY   8 LCDR1 RSSQRLVHSNGNTYLH  49 LCDR1 RSSQRLVHSNGNTYLH  49 LQKPGQSPKLLIYKVSNRFSGVPDRFSGSGSGTDFTLKISR LCDR2 KVSNRFS  50 LCDR2 KVSNRFS  50 VEAEDLGVYFCSQSTHVPYTFGGGTKLEIK LCDR3 SQSTHVPYT  51 LCDR3 SQSTHVPYT  51 hWN01 DIQMTQSPSSVSASVGDRVTITCRASQNINIWLSWYQQKPG   9 LCDR1 RASQNINIWLS  52 LCDR1 RASQNINIWLS  52 KAPKLLIYKASNLHTGVPSRFSGSGSGTDFTLTISSLQPED LCDR2 KASNLHT  53 LCDR2 KASNLHT  53 FATYYCLQGQSYPRTFGGGTKVEIK LCDR3 LQGQSYPRT  54 LCDR3 LQGQSYPRT  54 hWNv1 DIQMTQSPSSVSASVGDRVTITCRASQNINIWLSWYQQKPG   9 LCDR1 RASQNINIWLS  52 LCDR1 RASQNINIWLS  52 KAPKLLIYKASNLHTGVPSRFSGSGSGTDFTLTISSLQPED LCDR2 KASNLHT  53 LCDR2 KASNLHT  53 FATYYCLQGQSYPRTFGGGTKVEIK LCDR3 LQGQSYPRT  54 LCDR3 LQGQSYPRT  54 3E7 DIVMTQAAPSVPVTPGESVSISCRSSKSLLHSNGNTYLYWF  10 LCDR1 RSSKSLLHSNGNTYLY  55 LCDR1 RSSKSLLHSNGNTYLY  55 LQRPGQSPQRLIYYMSNLASGVPDRFSGRGSGTDFTLRISR LCDR2 YMSNLAS  56 LCDR2 YMSNLAS  56 VEAEDVGVYYCMQSLEYPLTFGAGTKLELK LCDR3 MQSLEYPLT  57 LCDR3 MQSLEYPLT  57 3G1 DIVMTQAAPSVPVTPGESVSISCRSSKSLLHSNGNTYLYWF  11 LCDR1 RSSKSLLHSNGNTYLY  58 LCDR1 RSSKSLLHSNGNTYLY  58 LQRPGQSPQLLIYRMSNLASGVPDRFSGSGSGTAFTLRISR LCDR2 RMSNLAS  59 LCDR2 RMSNLAS  59 VEAEDVGVYYCMQHLEYPYTFGGGTKLEIK LCDR3 MQHLEYPYT  60 LCDR3 MQHLEYPYT  60 2C7 DIVMSQSPSSLAVSAGEKVTMSCKSSQSLLNSRTRKNYLAW  12 LCDR1 KSSQSLLNSRTRKNYLA  61 LCDR1 KSSQSLLNSRTRKNYLA  61 YQQKPGQSPKLLIYWASTRESGVPDRFTGSGSGTDFTLTIS LCDR2 WASTRES  62 LCDR2 WASTRES  62 SVQAEDLAVYYCKQSYNLWTFGGGTKLEIK LCDR3 KQSYNLWT  63 LCDR3 KQSYNLWT  63 3D6 DIQMTQSPASQSASLGESVTITCLASQTIGTWLAWYQQKPG  13 LCDR1 LASQTIGTWLA  64 LCDR1 LASQTIGTWLA  64 KSPQLLIYAATSLADGVPSRFSGSGSGTKFSFKISSLQAED LCDR2 AATSLAD  65 LCDR2 AATSLAD  65 FVSYYCQQLYSTPWTFGGGTKLEIK LCDR3 QQLYSTPWT  66 LCDR3 QQLYSTPWT  66 mAb001 DIVLTQSPASLAVSLGQRATISCRASESVFGHGISPMHWYQ 104 LCDR1 RASESVFGHGISPMH 110 LCDR1 RASESVFGHGISPMH 110 QKPGQPPKLLIYRASNLKFGIPARFSGSGSRTDFTLTINPV LCDR2 RASNLKF 111 LCDR2 RASNLKF 111 EADDVATYYCQQSNEYPRTFGGGTKLEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112

TABLE 2 Nucleotide sequences of heavy chain variable regions (VHs) and light chain variable regions (VLs) of exemplary antibody molecules. Antibody VH SEQ ID NO A001-25 GAGGTCCAGCTGCAGCAGTCTGGACCTGTGCTGGTGAAGCCTGGGGCTTCAGTGAAGATGTCCTGTAAGGCTTCTGGATACACATTCACTGACC  81 ACTATATAAACTGGGTGAAGCAGAGCCATGGAAAGAGCCTTGAGTGGATTGGAGGTATTTATCCTTACCACGGTATTACTAAGTACAACCGGAA TTTCAAGGACAAGGCCACATTGACTGTTGACAAGTCCTCCAGCACAGCCTACATGGAGCTCAACAGCCTGACATCTGAACTCTCTGCAGTCTAT TACTGTGCAAGCGGGGGAAGTCGCCGGTACTTCGATGTCTGGGGCACAGGGACCACGGTCACCGTCTCCTCA hWN01 GAAGTGCAGCTCGTGGAATCTGGAGGAGGACTTGTGCAACCTGGAGGTTCCCTGCGACTGTCGTGTGCCGCATCCGGTTTCACCTTTTCCGACT  82 ACTACATGACCTGGGTCAGACAGGCGCCGGGGAAGGGACTGGAGTGGGTCGGCTTGATCCGCAACAAGAGGAACGGCGATACTGCTGAATACTC GGCCAGCGTGAAGGGGCGGTTCACCATCTCGAGAGATGACAGCAAGAACTCCCTGTACCTCCAAATGAACTCCCTGAAAACCGAGGACACTGCG GTGTACTACTGCGCCCGCCAGGGTCGCGGCTACACGCTGGACTATTGGGGCCAGGGCACCCTGGTCACTGTGTCAAGC hWNv1 GAAGTGCAGCTCGTGGAATCTGGAGGAGGACTTGTGCAACCTGGAGGTTCCCTGCGACTGTCGTGTGCCGCATCCGGTTTCACCTTTTCCGACT  83 ACTGGATGACCTGGGTCAGACAGGCGCCGGGGAAGGGACTGGAGTGGGTCGGCTTGATCCGCGCCAAGGCGAACGGCGATACTGCTGAATACTC GGCCAGCGTGAAGGGGCGGTTCACCATCTCGAGAGATGACAGCAAGAACTCCCTGTACCTCCAAATGAACTCCCTGAAAACCGAGGACACTGCG GTGTACTACTGCGCCCGCCAGGGTCGCGGCTACACGCTGGACTATTGGGGCCAGGGCACCCTGGTCACTGTGTCAAGC 3E7 CAGGTCCAACTGCAGCAGCCTGGGGCTGAGCTTGTGAAGCCTGGGGCTTCAGTGAAGATGTCCTGCAAGGCTTCTGGCTACACCTTCACCAGCT  84 ACTGGATAACCTGGGTGAAGCAGAGGCCTGGACAAGGCCTTGAGTGGATTGGAGATATTTATCCTGGTAGTGGTAGTACTAACTACAATGAGAA GTTCAAGAGCAAGGCCACACTGACTGTAGACACATCCTCCAGCACAGCCTACATGCAGCTCAGCAGCCTGACATCTGAGGACTCTGCGGTCTAT TACTGTGCAAGAGGTAGCTACTCCCTTGACTACTGGGGCCAAGGCACCACTCTCACAGTCTCCTCA 3G1 GAGGTTCAGCTGCAGCAGTCTGTGGCAGAGCTTGTGAGGCCAGGGGCCTCAGTCAAGTTGTCCTGCACAGCTTCTGGCTTCAACATTAAAAACA  85 CCTATATGCACTGGGTGAAGCAGAGGCCTGAACAGGGCCTGGAGTGGATTGGAAGGATTGATCCTGCGAATGGTAATACTAAATATGCCCCGAA GTTCCAGGGCAAGGCCACTATAACTGCAGACACATCCTCCAACACAGCCTACCTGCAGCTCAGCAGCCTGACATCTGAGGACACTGCCATCTAT TACTGTGCTCCTAGTAACTACCATGCTATGGACTACTGGGGTCAAGGAACCTCAGTCACCGTCTCCTCA 2C7 GATGTACAGCTTCAGGAGTCAGGACCTGGCCTCGTGAAACCTTCTCAGTCTCTGTCTCTCACCTGCTCTGTCACTGGCTACTCCATCACCAGTG  86 GTTATTACTGGAACTGGATCCGGCAGTTTCCAGGAAACAAACTGGAATGGATGGGCTACATAAGCTACGATGGTAGCAATAACTACAACCCATC TCTCAAAAATCGAATCTCCATCACTCGTGACACATCTAAGAACCAGTTTTTCCTGAAGTTGAATTCTGTGACTACTGAGGACACAGCCACATAT TACTGTGCAAGATGGAATGGTAACTACTTTGACTACTGGGGCCAAGGCACCACTCTCACAGTCTCCTCA 3D6 GAGGTCCAGCTGCAACAGTCTGGACCTGTGCTGGTGAAGCCTGGGGCTTCAGTGAAGATGTCCTGTAAGGCTTCTGGATACACATTCACTGACT  87 ACTATATGAACTGGGTGAAGCAGAGCCATGGAAAGAGCCTTGAGTGGATTGGAGTTATTAATCCTTACAACGGTGGTACTAGCTACAACCAGAA GTTCAAGGGCAAGGCCACATTGACTGTTGACAAGTCCTCCAGCACAGCCTACATGGAGCTCAACAGCCTGACATCTGAGGACTCTGCAGTCTAT TACTGTGCAAGAACCAGACAGCTCGGGCTACGTTGGTTTGCTTACTGGGGCCAAGGGACTCTGGTCACTGTCTCTGCA mAb001 GAAGTGAAGTTGGTGGAGTCTGGGGGAGACTTGGTGAAACCTGGAGGGTCCCTGAGACTCTCCTGTGCAGCCTCTGAATTCACTTTCAGTGATT 113 ATGCCATGTCTTGGGTTCGCCAGACTCCGGCGAAGAGGCTGGAGTGGGTCGCATACATTAGTAGTGATGGTGATAGTACCTACTATCCGGACAA TATTAAGGGCCGATTCACCATCTCCAGAGACAATGCCAAGAACACCCTATACCTGCAAATGAACAGTCTGAGGTCTGAGGACACGGCCATGTAT TTTTGTGCAAGAGAAATACGGCTAAGGGGGTACTTCGATGTCTGGGGCGCAGGGACCACGGTCACCGTCTCCTCA Antibody VL SEQ ID NO A001-25 GATGTTGTGATGACCCAAACTCCACTCTCCCTGCCTGTCAGTCTTGGAGATCAAGCCTCCATCTCTTGCAGATCTAGTCAGAGACTTGTACACA  88 GTAATGGAAACACCTATTTACATTGGTACCTGCAGAAGCCAGGCCAGTCTCCAAAGCTCCTGATCTACAAAGTTTCCAACCGATTTTCTGGGGT CCCAGACAGGTTCAGTGGCAGTGGATCAGGGACAGATTTCACACTCAAGATCAGCAGAGTGGAGGCTGAGGATCTGGGAGTTTATTTCTGCTCT CAAAGTACACATGTTCCGTACACGTTCGGAGGGGGGACCAAGCTGGAAATAAAA hWN01 GACATCCAGATGACTCAGTCCCCGTCCTCAGTCTCCGCATCCGTGGGAGATCGCGTGACGATTACTTGCCGGGCGTCGCAGAACATCAACATCT  89 GGCTGTCGTGGTACCAGCAGAAGCCCGGGAAGGCTCCGAAGCTGCTGATCTACAAGGCCTCAAACTTGCACACCGGCGTGCCTTCCCGCTTTTC TGGTTCGGGCTCCGGGACTGACTTCACCCTGACCATCAGCAGCCTGCAACCCGAGGACTTCGCCACCTATTACTGCCTCCAAGGACAGTCCTAC CCAAGAACCTTCGGCGGAGGAACCAAGGTCGAAATCAAA hWNv1 GACATCCAGATGACTCAGTCCCCGTCCTCAGTCTCCGCATCCGTGGGAGATCGCGTGACGATTACTTGCCGGGCGTCGCAGAACATCAACATCT  89 GGCTGTCGTGGTACCAGCAGAAGCCCGGGAAGGCTCCGAAGCTGCTGATCTACAAGGCCTCAAACTTGCACACCGGCGTGCCTTCCCGCTTTTC TGGTTCGGGCTCCGGGACTGACTTCACCCTGACCATCAGCAGCCTGCAACCCGAGGACTTCGCCACCTATTACTGCCTCCAAGGACAGTCCTAC CCAAGAACCTTCGGCGGAGGAACCAAGGTCGAAATCAAA 3E7 GATATTGTGATGACTCAGGCTGCACCCTCTGTACCTGTCACTCCTGGAGAGTCAGTATCCATCTCCTGCAGGTCTAGTAAGAGTCTTCTGCATA  90 GTAATGGCAACACTTACTTGTATTGGTTCCTGCAGAGGCCAGGCCAGTCTCCTCAGCGCCTGATATATTATATGTCCAACCTTGCCTCAGGAGT CCCAGACAGGTTCAGTGGCAGAGGGTCAGGAACTGATTTCACACTGAGAATCAGTAGAGTGGAGGCTGAGGATGTGGGTGTTTATTACTGTATG CAAAGTCTAGAATATCCTCTCACGTTCGGTGCTGGGACCAAGCTGGAGCTGAAA 3G1 GATATTGTGATGACTCAGGCTGCACCCTCTGTACCTGTCACTCCTGGAGAGTCAGTATCCATCTCCTGCAGGTCTAGTAAGAGTCTCCTGCATA  91 GTAATGGCAACACTTACTTGTATTGGTTCCTGCAGAGGCCAGGCCAGTCTCCTCAGCTCCTGATATATCGGATGTCCAACCTTGCCTCAGGAGT CCCAGACAGGTTCAGTGGCAGTGGGTCAGGAACTGCTTTCACACTGAGAATCAGTAGAGTGGAGGCTGAGGATGTGGGTGTTTATTACTGTATG CAACATCTAGAATATCCGTACACGTTCGGAGGGGGGACCAAGCTGGAAATAAAA 2C7 GACATTGTGATGTCACAGTCTCCATCCTCCCTGGCTGTGTCAGCAGGAGAGAAGGTCACTATGAGCTGCAAATCCAGTCAGAGTCTGCTCAACA  92 GTAGAACCCGAAAGAACTACTTGGCTTGGTACCAGCAGAAACCAGGGCAGTCTCCTAAACTGCTGATCTACTGGGCATCCACTAGGGAATCTGG GGTCCCTGATCGCTTCACAGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTGTGCAGGCTGAAGACCTGGCAGTTTATTACTGC AAGCAATCTTATAATCTGTGGACGTTCGGTGGAGGCACCAAGCTGGAAATCAAA 3D6 GACATTCAGATGACCCAGTCTCCTGCCTCCCAGTCTGCATCTCTGGGAGAAAGTGTCACCATCACATGCCTGGCAAGTCAGACCATTGGTACAT  93 GGTTAGCATGGTATCAGCAGAAACCAGGGAAATCTCCTCAGCTCCTGATTTATGCTGCAACCAGCTTGGCAGATGGGGTCCCATCAAGGTTCAG TGGTAGTGGATCTGGCACAAAATTTTCTTTCAAGATCAGCAGCCTACAGGCTGAAGATTTTGTAAGTTATTACTGTCAACAACTTTACAGTACT CCGTGGACGTTCGGTGGAGGCACCAAGCTGGAAATCAAA mAb001 GACATTGTGCTGACCCAATCTCCAGCTTCTTTGGCTGTGTCTCTAGGGCAGAGGGCCACCATATCCTGCAGAGCCAGTGAAAGTGTTTTTGGTC 114 ATGGCATTAGTCCTATGCACTGGTACCAGCAGAAACCAGGACAGCCACCCAAACTCCTCATCTATCGTGCATCCAACCTAAAATTTGGGATCCC TGCCAGGTTCAGTGGCAGTGGGTCTAGGACAGACTTCACCCTCACCATTAATCCTGTGGAGGCTGATGATGTTGCAACCTATTACTGTCAGCAA AGTAATGAATATCCTCGGACGTTCGGTGGAGGCACCAAGCTGGAGATCAAA

TABLE 8 Amino acid sequences of heavy chain variable regions (VHs), light chain variable regions (VLs), heavy chain CDRs (HCDRs), and light chain CDRs (LCDRs) of exemplary humanized antibody molecules. Heavy and light chain CDRs defined according to Chothia system and Kabat system are shown. Antibody/ SEQ ID SEQ ID SEQ ID Chain VH NO Chothia CDR NO Kabat CDR NO mAb001_ EVKLVESGGGLVQPGGSLRLSCSASEFTFSDYAMSWVRQAP 115 HCDR1 EFTFSDY 105 HCDR1 DYAMS 108 VH1 GKGLEWVSYISSDGDSTYYPDNIKGRFTISRDNSKNTLYVQ HCDR2 SSDGDS 106 HCDR2 YISSDGDSTYYPDNIKG 109 MSSLRAEDTAVYFCAREIRLRGYFDVWGQGTTVTVSS HCDR3 EIRLRGYFDV 107 HCDR3 EIRLRGYFDV 107 mAb001_ EVKLVESGGGLVKPGGSLRLSCAASEFTFSDYAMSWVRQAP 116 HCDR1 EFTFSDY 105 HCDR1 DYAMS 108 VH2 GKRLEWVAYISSDGDSIYYPDNIKGRFTISRDNAKNSLYLQ HCDR2 SSDGDS 106 HCDR2 YISSDGDSIYYPDNIKG 145 MNSLRAEDTAMYFCAREIRLRGYFDVWGQGTTVTVSS HCDR3 EIRLRGYFDV 107 HCDR3 EIRLRGYFDV 107 mAb001_ EVKLVESGGGLVQPGGSLRLSCAASEFTFSDYAMSWVRQAP 117 HCDR1 EFTFSDY 105 HCDR1 DYAMS 108 VH3 GKRLEWVAYISSDGDSTYYPDSVKGRFTISRDNAKNSLYLQ HCDR2 SSDGDS 106 HCDR2 YISSDGDSTYYPDSVKG 146 MNSLRAEDTAMYFCAREIRLRGYFDVWGQGTTVTVSS HCDR3 EIRLRGYFDV 107 HCDR3 EIRLRGYFDV 107 mAb001_ EVKLVESGEGLVQPGGSLRLSCAASEFTFSDYAMSWVRQAP 118 HCDR1 EFTFSDY 105 HCDR1 DYAMS 108 VH4 GKRLEWVAYISSDGDSTYYPDNIKGRFTISRDNSKNTLYLQ HCDR2 SSDGDS 106 HCDR2 YISSDGDSTYYPDNIKG 109 MGSLRAEDMAMYFCAREIRLRGYFDVWGQGTTVTVSS HCDR3 EIRLRGYFDV 107 HCDR3 EIRLRGYFDV 107 Antibody/ SEQ ID SEQ ID SEQ ID Chain VL NO Chothia CDR NO Kabat CDR NO mAb001_ EIVMTQSPATLSVSPGERATLSCRASESVFGHGISPLHWYQ 119 LCDR1 RASESVFGHGISPLH 138 LCDR1 RASESVFGHGISPLH 138 VL1 QKPGQAPKLLIYRASNRKTGIPARFSGSGSGTEFTLTISSL LCDR2 RASNRKT 139 LCDR2 RASNRKT 139 QSEDFAVYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ DIQMTQSPSTLSASVGDRVTITCRASESVFGHGISPLHWYQ 120 LCDR1 RASESVFGHGISPLH 138 LCDR1 RASESVFGHGISPLH 138 VL2 QKPGKAPKLLIYRASNLKFGVPSRFSGSGSGTEFTLTISSL LCDR2 RASNLKF 111 LCDR2 RASNLKF 111 QPDDFATYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ EIVMTQSPATLSVSPGERATLSCRASESVFGHGISPLHWYQ 121 LCDR1 RASESVFGHGISPLH 138 LCDR1 RASESVFGHGISPLH 138 VL3 QKPGQPPRLLIYRASNRKTGIPARFSGSGSGTEFTLTISSL LCDR2 RASNRKT 139 LCDR2 RASNRKT 139 QSEDFAVYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ DIQMTQSPSTLSASVGDRVTITCRASESVFGHGISPLHWYQ 122 LCDR1 RASESVFGHGISPLH 138 LCDR1 RASESVFGHGISPLH 138 VLr2_1 QKPGKAPKLLIYRASNLKFGVPSRFSGSGSRTDFTLTISSL LCDR2 RASNLKF 111 LCDR2 RASNLKF 111 QPDDFATYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ DIQMTQSPSTLSASVGDRVTITCRASESVFGHGISPLHWYQ 123 LCDR1 RASESVFGHGISPLH 138 LCDR1 RASESVFGHGISPLH 138 VLr2_2 QKPGKAPKLLIYRASNLKFGIPSRFSGSGSRTDFTLTISSL LCDR2 RASNLKF 111 LCDR2 RASNLKF 111 QPDDFATYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ DIQMTQSPSTLSASVGDRVTITCRASESVFGHGISPLHWYQ 124 LCDR1 RASESVFGHGISPLH 138 LCDR1 RASESVFGHGISPLH 138 VLr2_3 QKPGQPPKLLIYRASNLKFGIPSRFSGSGSGTEFTLTISSL LCDR2 RASNLKF 111 LCDR2 RASNLKF 111 QPDDFATYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ DIVLTQSPSTLSASVGDRVTITCRASESVFGHGISPMHWYQ 125 LCDR1 RASESVFGHGISPMH 110 LCDR1 RASESVFGHGISPMH 110 VLr2_4 QKPGKAPKLLIYRASNLKFGVPSRFSGSGSGTEFTLTISSL LCDR2 RASNLKF 111 LCDR2 RASNLKF 111 QPDDFATYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001- DIQMTQSPSTLSASVGDRVTITCRASESVFGHGISPLHWYQ 126 LCDR1 RASESVFGHGISPLH 138 LCDR1 RASESVFGHGISPLH 138 VLr2_5 QKPGKAPKLLIYRASNLKFGIPARFSGSGSGTEFTLTISSL LCDR2 RASNLKF 111 LCDR2 RASNLKF 111 QPDDFATYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001- DIVLTQSPASLAVSLGQRATISCRASESIFGHGISPMHWYQ 127 LCDR1 RASESIFGHGISPMH 140 LCDR1 RASESIFGHGISPMH 140 VLr2_6 QKPGQPPKLLIYRASNLKFGIPARFSGSGSRTDFTLTINPV LCDR2 RASNLKF 111 LCDR2 RASNLKF 111 EADDVATYYCQQSNEYPRTFGGGTKLEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ DIVLTQSPASLAVSLGQRATISCRASESVFGHGISPMHWYQ 128 LCDR1 RASESVFGHGISPMH 110 LCDR1 RASESVFGHGISPMH 110 VLr2_7 QKPGQPPKLLIYRASSLKFGIPARFSGSGSRTDFTLTINPV LCDR2 RASSLKF 141 LCDR2 RASSLKF 141 EADDVATYYCQQSNEYPRTFGGGTKLEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ DIVLTQSPASLAVSLGQRATISCRASESVFGHGISPMHWYQ 129 LCDR1 RASESVFGHGISPMH 110 LCDR1 RASESVFGHGISPMH 110 VLr2_8 QKPGQPPKLLIYRASNLKSGIPARFSGSGSRTDFTLTINPV LCDR2 RASNLKS 142 LCDR2 RASNLKS 142 EADDVATYYCQQSNEYPRTFGGGTKLEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ DIVMTQSPATLSVSPGERATLSCRASESVFGHGISPLHWYQ 130 LCDR1 RASESVFGHGISPLH 138 LCDR1 RASESVFGHGISPLH 138 VLr2_9 QKPGQAPKLLIYRASNLKTGIPARFSGSGSRTDFTLTISSL LCDR2 RASNLKT 143 LCDR2 RASNLKT 143 QSEDFATYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ EIVMTQSPATLSVSPGERATISCRASESVFGHGISPLHWYQ 131 LCDR1 RASESVFGHGISPLH 138 LCDR1 RASESVFGHGISPLH 138 VLr2_10 QKPGQAPKLLIYRASNRKTGIPARFSGSGSGTEFTLTISPV LCDR2 RASNRKT 139 LCDR2 RASNRKT 139 QSEDFAVYYCQQSNEYPRTFGGGTKLEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001- DIQMTQSPSTLSASVGDRVTITCRASESIFGHGISPLHWYQ 132 LCDR1 RASESIFGHGISPLH 144 LCDR1 RASESIFGHGISPLH 144 VLr3_1 QKPGKAPKLLIYRASNLKSGIPSRFSGSGSRTEFTLTISSL LCDR2 RASNLKS 142 LCDR2 RASNLKS 142 QPDDFATYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ DIQMTQSPSTLSASVGDRVTITCRASESIFGHGISPLHWYQ 133 LCDR1 RASESIFGHGISPLH 144 LCDR1 RASESIFGHGISPLH 144 VLr3_2 QKPGKAPKLLIYRASNLKSGVPSRFSGSGSRTEFTLTISSL LCDR2 RASNLKS 142 LCDR2 RASNLKS 142 QPDDFATYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001- DIQMTQSPSTLSASVGDRVTITCRASESIFGHGISPLHWYQ 134 LCDR1 RASESIFGHGISPLH 144 LCDR1 RASESIFGHGISPLH 144 VLr3_3 QKPGKAPKLLIYRASNLKSGVPARFSGSGSRTEFTLTISSL LCDR2 RASNLKS 142 LCDR2 RASNLKS 142 QPDDFATYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ DIQMTQSPSTLSASVGDRVTITCRASESVFGHGISPLHWYQ 135 LCDR1 RASESVFGHGISPLH 138 LCDR1 RASESVFGHGISPLH 138 VLr3_4 QKPGKAPKLLIYRASNLKSGVPSRFSGSGSRTEFTLTISSL LCDR2 RASNLKS 142 LCDR2 RASNLKS 142 QPDDFATYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ DIQMTQSPSTLSASVGDRVTITCRASESIFGHGISPLHWYQ 136 LCDR1 RASESIFGHGISPLH 144 LCDR1 RASESIFGHGISPLH 144 VLr3_5 QKPGKAPKLLIYRASNLKSGVPSRFSGSGSRTDFTLTISSL LCDR2 RASNLKS 142 LCDR2 RASNLKS 142 QPDDFATYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112 mAb001_ DIQMTQSPSTLSASVGDRVTITCRASESIFGHGISPLHWYQ 137 LCDR1 RASESIFGHGISPLH 144 LCDR1 RASESIFGHGISPLH 144 VLr3_6 QKPGKAPKLLIYRASNLKSGIPSRFSGSGSRTDFTLTISSL LCDR2 RASNLKS 142 LCDR2 RASNLKS 142 QPDDFATYYCQQSNEYPRTFGGGTKVEIK LCDR3 QQSNEYPRT 112 LCDR3 QQSNEYPRT 112

In an embodiment, the antibody molecule comprises one, two, or three CDRs of the VH region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001), using the Kabat or Chothia definitions of CDRs. In an embodiment, the antibody molecule comprises one, two, or three CDRs of the VL region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001), using the Kabat or Chothia definitions of CDRs. In an embodiment, the antibody molecule comprises one or more (e.g., two or three) CDRs of the VH region and/or one or more (e.g., two or three) CDRs of the VL region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001), using the Kabat or Chothia definitions of CDRs.

In an embodiment, the antibody molecule comprises one, two, or three HCDRs described in Table 1 or 8. In an embodiment, the antibody molecule comprises one, two, or three LCDRs described in Table 1 or 8. In an embodiment, the antibody molecule comprises one or more (e.g., two or three) HCDRs and/or one or more (e.g., two or three) LCDRs described in Table 1 or 8.

In an embodiment, the antibody molecule comprises one, two, three, or four frameworks of the VH region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001). In an embodiment, the antibody molecule comprises one, two, three, or four frameworks of the VL region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001). In an embodiment, the antibody molecule comprises one or more (e.g., two, three, or four) frameworks of the VH region and/or one or more (e.g., two, three, or four) frameworks of the VL region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001).

In an embodiment, the antibody molecule comprises a heavy chain variable region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001). In an embodiment, the antibody molecule comprises a light chain variable region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001). In an embodiment, the antibody molecule comprises a heavy chain variable region and a light chain variable region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001).

In an embodiment, the antibody molecule comprises a heavy chain variable region having an amino acid sequence described in Table 1 or 8. In an embodiment, the antibody molecule comprises a light chain variable region having an amino acid sequence described in Table 1 or 8. In an embodiment, the antibody molecule comprises a heavy chain variable region having an amino acid sequence described in Table 1 or 8 and a light chain variable region having an amino acid sequences described in Table 1 or 8.

In an embodiment, the antibody molecule comprises a heavy chain variable region encoded by a nucleotide sequence described in Table 2. In an embodiment, the antibody molecule comprises a light chain variable region encoded by a nucleotide sequence described in Table 2. In an embodiment, the antibody molecule comprises a heavy chain variable region encoded by a nucleotide sequence described in Table 2 and a light chain variable region encoded by a nucleotide sequence described in Table 2.

In an embodiment, the antibody molecule further comprises a heavy chain constant region. In an embodiment, the antibody molecule further comprises a light chain constant region. In an embodiment, the antibody molecule further comprises a heavy chain constant region and a light chain constant region. In an embodiment, the antibody molecule comprises a heavy chain constant region, a light chain constant region, and heavy and light chain variable regions of an antibody molecule described in Table 1 or 8. In certain embodiments, the antibody molecule comprises a heavy chain constant region, a light chain constant region, and variable regions that comprise one, two, three, four, five, or six CDRs of an antibody molecule described in Table 1 or 8.

In an embodiment, the antibody molecule binds to a core pentasaccharide region of the LPS. In an embodiment, the core pentasaccharide region comprises one or more (e.g., two) Kdo residues and one or more (e.g., two or three) Hep residues. In an embodiment, the antibody molecule binds to one or more (e.g., two) Kdo residues, or one or more (e.g., two or three) Hep residues, or any combination thereof.

In an embodiment, the ADC or antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody mAb001 (e.g., SEQ ID NO: 108); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody mAb001 (e.g., SEQ ID NO: 109); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody mAb001 (e.g., SEQ ID NO: 107).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 (e.g., SEQ ID NO: 108); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 (e.g., SEQ ID NO: 109); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 (e.g., SEQ ID NO: 107).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 (e.g., SEQ ID NO: 108); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 (e.g., SEQ ID NO: 109); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 (e.g., SEQ ID NO: 107).

In an embodiment, the ADC or antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 110); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody mAb001 (e.g., SEQ ID NO: 111); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 110); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 (e.g., SEQ ID NO: 111); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 110); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 (e.g., SEQ ID NO: 111); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the ADC or antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody mAb001 (e.g., SEQ ID NO: 108); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody mAb001 (e.g., SEQ ID NO: 109); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody mAb001 (e.g., SEQ ID NO: 107), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 110); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody mAb001 (e.g., SEQ ID NO: 111); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 (e.g., SEQ ID NO: 108); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 (e.g., SEQ ID NO: 109); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 (e.g., SEQ ID NO: 107), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 110); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 (e.g., SEQ ID NO: 111); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 (e.g., SEQ ID NO: 108); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 (e.g., SEQ ID NO: 109); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 (e.g., SEQ ID NO: 107), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 110); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 (e.g., SEQ ID NO: 111); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the ADC or antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody mAb001 (e.g., SEQ ID NO: 105); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody mAb001 (e.g., SEQ ID NO: 106); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody mAb001 (e.g., SEQ ID NO: 107).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 (e.g., SEQ ID NO: 105); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 (e.g., SEQ ID NO: 106); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 (e.g., SEQ ID NO: 107).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 (e.g., SEQ ID NO: 105); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 (e.g., SEQ ID NO: 106); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 (e.g., SEQ ID NO: 107).

In an embodiment, the ADC or antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 110); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody mAb001 (e.g., SEQ ID NO: 111); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 110); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 (e.g., SEQ ID NO: 111); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 110); an LCDR2 comprising the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 111); and an LCDR3 comprising the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the ADC or antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody mAb001 (e.g., SEQ ID NO: 105); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody mAb001 (e.g., SEQ ID NO: 106); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody mAb001 (e.g., SEQ ID NO: 107), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 110); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody mAb001 (e.g., SEQ ID NO: 111); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 (e.g., SEQ ID NO: 105); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 (e.g., SEQ ID NO: 106); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 (e.g., SEQ ID NO: 107), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 110); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 (e.g., SEQ ID NO: 111); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody mAb001 (e.g., SEQ ID NO: 105); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody mAb001 (e.g., SEQ ID NO: 106); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody mAb001 (e.g., SEQ ID NO: 107), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody mAb001 (e.g., SEQ ID NO: 110); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody mAb001 (e.g., SEQ ID NO: 111); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody mAb001 (e.g., SEQ ID NO: 112).

In an embodiment, the ADC or antibody molecule further comprises one or more human or human derived heavy or light chain variable region frameworks.

In an embodiment, the ADC or antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of antibody mAb001 (e.g., SEQ ID NO: 103). In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of antibody mAb001 (e.g., SEQ ID NO: 103).

In an embodiment, the ADC or antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of antibody mAb001 (e.g., SEQ ID NO: 104). In an embodiment, the light chain variable region comprises the amino acid sequence of the VL of antibody mAb001 (e.g., SEQ ID NO: 104).

In an embodiment, the ADC or antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of antibody mAb001 (e.g., SEQ ID NO: 103), and wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of antibody mAb001 (e.g., SEQ ID NO: 104).

In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of antibody mAb001 (e.g., SEQ ID NO: 103) and the light chain variable region comprises the amino acid sequence of the VL of antibody mAb001 (e.g., SEQ ID NO: 104).

In an embodiment, the heavy chain variable region comprises an amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 113). In an embodiment, the light chain variable region comprises and amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 114).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody A001-25 (e.g., SEQ ID NO: 17); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody A001-25 (e.g., SEQ ID NO: 18); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody A001-25 (e.g., SEQ ID NO: 16).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody A001-25 (e.g., SEQ ID NO: 17); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody A001-25 (e.g., SEQ ID NO: 18); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody A001-25 (e.g., SEQ ID NO: 16).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody A001-25 (e.g., SEQ ID NO: 17); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody A001-25 (e.g., SEQ ID NO: 18); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody A001-25 (e.g., SEQ ID NO: 16).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 49); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody A001-25 (e.g., SEQ ID NO: 50); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody A001-25 (e.g., SEQ ID NO: 51).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 49); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody A001-25 (e.g., SEQ ID NO: 50); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody A001-25 (e.g., SEQ ID NO: 51).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 49); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody A001-25 (e.g., SEQ ID NO: 50); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody A001-25 (e.g., SEQ ID NO: 51).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody A001-25 (e.g., SEQ ID NO: 17); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody A001-25 (e.g., SEQ ID NO: 18); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody A001-25 (e.g., SEQ ID NO: 16), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 49); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody A001-25 (e.g., SEQ ID NO: 50); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody A001-25 (e.g., SEQ ID NO: 51).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody A001-25 (e.g., SEQ ID NO: 17); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody A001-25 (e.g., SEQ ID NO: 18); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody A001-25 (e.g., SEQ ID NO: 16), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 49); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody A001-25 (e.g., SEQ ID NO: 50); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody A001-25 (e.g., SEQ ID NO: 51).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody A001-25 (e.g., SEQ ID NO: 17); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody A001-25 (e.g., SEQ ID NO: 18); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody A001-25 (e.g., SEQ ID NO: 16), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 49); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody A001-25 (e.g., SEQ ID NO: 50); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody A001-25 (e.g., SEQ ID NO: 51).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody A001-25 (e.g., SEQ ID NO: 14); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody A001-25 (e.g., SEQ ID NO: 15); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody A001-25 (e.g., SEQ ID NO: 16).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody A001-25 (e.g., SEQ ID NO: 14); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody A001-25 (e.g., SEQ ID NO: 15); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody A001-25 (e.g., SEQ ID NO: 16).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody A001-25 (e.g., SEQ ID NO: 14); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody A001-25 (e.g., SEQ ID NO: 15); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody A001-25 (e.g., SEQ ID NO: 16).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 49); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody A001-25 (e.g., SEQ ID NO: 50); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody A001-25 (e.g., SEQ ID NO: 51).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 49); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody A001-25 (e.g., SEQ ID NO: 50); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody A001-25 (e.g., SEQ ID NO: 51).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 49); an LCDR2 comprising the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 50); and an LCDR3 comprising the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 51).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody A001-25 (e.g., SEQ ID NO: 14); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody A001-25 (e.g., SEQ ID NO: 15); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody A001-25 (e.g., SEQ ID NO: 16), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 49); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody A001-25 (e.g., SEQ ID NO: 50); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody A001-25 (e.g., SEQ ID NO: 51).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody A001-25 (e.g., SEQ ID NO: 14); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody A001-25 (e.g., SEQ ID NO: 15); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody A001-25 (e.g., SEQ ID NO: 16), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 49); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody A001-25 (e.g., SEQ ID NO: 50); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody A001-25 (e.g., SEQ ID NO: 51).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody A001-25 (e.g., SEQ ID NO: 14); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody A001-25 (e.g., SEQ ID NO: 15); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody A001-25 (e.g., SEQ ID NO: 16), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody A001-25 (e.g., SEQ ID NO: 49); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody A001-25 (e.g., SEQ ID NO: 50); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody A001-25 (e.g., SEQ ID NO: 51).

In an embodiment, the antibody molecule further comprises one or more human or human derived heavy or light chain variable region frameworks.

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of antibody A001-25 (e.g., SEQ ID NO: 1). In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of antibody A001-25 (e.g., SEQ ID NO: 1).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of antibody A001-25 (e.g., SEQ ID NO: 8). In an embodiment, the light chain variable region comprises the amino acid sequence of the VL of antibody A001-25 (e.g., SEQ ID NO: 8).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of antibody A001-25 (e.g., SEQ ID NO: 1), and wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of antibody A001-25 (e.g., SEQ ID NO: 8).

In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of antibody A001-25 (e.g., SEQ ID NO: 1) and the light chain variable region comprises the amino acid sequence of the VL of antibody A001-25 (e.g., SEQ ID NO: 8).

In an embodiment, the heavy chain variable region comprises an amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 81). In an embodiment, the light chain variable region comprises and amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 88).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody hWN01 (e.g., SEQ ID NO: 22); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody hWN01 (e.g., SEQ ID NO: 23); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody hWN01 (e.g., SEQ ID NO: 21).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWN01 (e.g., SEQ ID NO: 22); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWN01 (e.g., SEQ ID NO: 23); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWN01 (e.g., SEQ ID NO: 21).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWN01 (e.g., SEQ ID NO: 22); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWN01 (e.g., SEQ ID NO: 23); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWN01 (e.g., SEQ ID NO: 21).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody hWN01 (e.g., SEQ ID NO: 52); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody hWN01 (e.g., SEQ ID NO: 53); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody hWN01 (e.g., SEQ ID NO: 54).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWN01 (e.g., SEQ ID NO: 52; an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWN01 (e.g., SEQ ID NO: 53; or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWN01 (e.g., SEQ ID NO: 54.

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWN01 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWN01 (e.g., SEQ ID NO: 53); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWN01 (e.g., SEQ ID NO: 54).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody hWN01 (e.g., SEQ ID NO: 22); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody hWN01 (e.g., SEQ ID NO: 23); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody hWN01 (e.g., SEQ ID NO: 21), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody hWN01 (e.g., SEQ ID NO: 52); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody hWN01 (e.g., SEQ ID NO: 53); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody hWN01 (e.g., SEQ ID NO: 54).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWN01 (e.g., SEQ ID NO: 22); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWN01 (e.g., SEQ ID NO: 23); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWN01 (e.g., SEQ ID NO: 21), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWN01 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWN01 (e.g., SEQ ID NO: 53); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWN01 (e.g., SEQ ID NO: 54).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWN01 (e.g., SEQ ID NO: 22); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWN01 (e.g., SEQ ID NO: 23); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWN01 (e.g., SEQ ID NO: 21), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWN01 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWN01 (e.g., SEQ ID NO: 53); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWN01 (e.g., SEQ ID NO: 54).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody hWN01 (e.g., SEQ ID NO: 19); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody hWN01 (e.g., SEQ ID NO: 20); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody hWN01 (e.g., SEQ ID NO: 21).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWN01 (e.g., SEQ ID NO: 19); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWN01 (e.g., SEQ ID NO: 20); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWN01 (e.g., SEQ ID NO: 21).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the hCDR1 of antibody hWN01 (e.g., SEQ ID NO: 19); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWN01 (e.g., SEQ ID NO: 20); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWN01 (e.g., SEQ ID NO: 21).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody hWN01 (e.g., SEQ ID NO: 52); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody hWN01 (e.g., SEQ ID NO: 53); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody hWN01 (e.g., SEQ ID NO: 54).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWN01 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWN01 (e.g., SEQ ID NO: 53); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWN01 (e.g., SEQ ID NO: 54).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWN01 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWN01 (e.g., SEQ ID NO: 53); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWN01 (e.g., SEQ ID NO: 54).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody hWN01 (e.g., SEQ ID NO: 19); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody hWN01 (e.g., SEQ ID NO: 20); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody hWN01 (e.g., SEQ ID NO: 21), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody hWN01 (e.g., SEQ ID NO: 52); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody hWN01 (e.g., SEQ ID NO: 53); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody hWN01 (e.g., SEQ ID NO: 54).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWN01 (e.g., SEQ ID NO: 19); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWN01 (e.g., SEQ ID NO: 20); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWN01 (e.g., SEQ ID NO: 21), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWN01 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWN01 (e.g., SEQ ID NO: 53); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWN01 (e.g., SEQ ID NO: 54).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of SEQ ID NO: 19; an HCDR2 comprising the amino acid sequence of SEQ ID NO: 20; and an HCDR3 comprising the amino acid sequence of SEQ ID NO: 21, and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of SEQ ID NO: 52; an LCDR2 comprising the amino acid sequence of SEQ ID NO: 53; and an LCDR3 comprising the amino acid sequence of SEQ ID NO: 54.

In an embodiment, the antibody molecule further comprises one or more human or human derived heavy or light chain variable region frameworks.

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of antibody hWN01 (e.g., SEQ ID NO: 2). In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of antibody hWN01 (e.g., SEQ ID NO: 2).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of antibody hWN01 (e.g., SEQ ID NO: 9). In an embodiment, the light chain variable region comprises the amino acid sequence of the VL of antibody hWN01 (e.g., SEQ ID NO: 9).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of antibody hWN01 (e.g., SEQ ID NO: 2), and wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of antibody hWN01 (e.g., SEQ ID NO: 9). In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of antibody hWN01 (e.g., SEQ ID NO: 2), and the light chain variable region comprises the amino acid sequence of the VL of antibody hWN01 (e.g., SEQ ID NO: 9).

In an embodiment, the heavy chain variable region comprises an amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 82). In an embodiment, the light chain variable region comprises and amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 89).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 27); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 28); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 21).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 27); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 28); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 21).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 27); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 28); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 21).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 52); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 53); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 54).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 53); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 54).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 53); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 54).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 27); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 28); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 21), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 52); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 53); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 54).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 27); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 28); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 21), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 53); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 54).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 27); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 28); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 21), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 53); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 54).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 19); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 25); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 21).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 19); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 25); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 21).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 19); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 25); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 21).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 52); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 53); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 54).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 53); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWN01 (e.g., SEQ ID NO: 54).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWN01 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWN01 (e.g., SEQ ID NO: 53); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWN01 (e.g., SEQ ID NO: 54).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 19); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 25); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 21), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 52); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 53); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 54).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 19); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 25); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 21), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 53); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 54).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 19); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 25); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 21), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody hWNv1 (e.g., SEQ ID NO: 52); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody hWNv1 (e.g., SEQ ID NO: 53); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody hWNv1 (e.g., SEQ ID NO: 54).

In an embodiment, the antibody molecule further comprises one or more human or human derived heavy or light chain variable region frameworks.

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of hWNv1 (e.g., SEQ ID NO: 3). In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of hWNv1 (e.g., SEQ ID NO: 3).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of hWNv1 (e.g., SEQ ID NO: 9). In an embodiment, the light chain variable region comprises the amino acid sequence of the VL of hWNv1 (e.g., SEQ ID NO: 9).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of hWNv1 (e.g., SEQ ID NO: 3), and wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of hWNv1 (e.g., SEQ ID NO: 9).

In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of hWNv1 (e.g., SEQ ID NO: 3), and wherein the light chain variable region comprises the amino acid sequence of the VL of hWNv1 (e.g., SEQ ID NO: 9).

In an embodiment, the heavy chain variable region comprises an amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 83). In an embodiment, the light chain variable region comprises and amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 89).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 3E7 (e.g., SEQ ID NO: 32); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 3E7 (e.g., SEQ ID NO: 33); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 3E7 (e.g., SEQ ID NO: 31).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3E7 (e.g., SEQ ID NO: 32); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3E7 (e.g., SEQ ID NO: 33); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3E7 (e.g., SEQ ID NO: 31).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3E7 (e.g., SEQ ID NO: 32); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3E7 (e.g., SEQ ID NO: 33); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3E7 (e.g., SEQ ID NO: 31).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 3E7 (e.g., SEQ ID NO: 55); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 3E7 (e.g., SEQ ID NO: 56); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 3E7 (e.g., SEQ ID NO: 57).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3E7 (e.g., SEQ ID NO: 55); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3E7 (e.g., SEQ ID NO: 56); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3E7 (e.g., SEQ ID NO: 57).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3E7 (e.g., SEQ ID NO: 55); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3E7 (e.g., SEQ ID NO: 56); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3E7 (e.g., SEQ ID NO: 57).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 3E7 (e.g., SEQ ID NO: 32); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 3E7 (e.g., SEQ ID NO: 33); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 3E7 (e.g., SEQ ID NO: 31), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 3E7 (e.g., SEQ ID NO: 55); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 3E7 (e.g., SEQ ID NO: 56); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 3E7 (e.g., SEQ ID NO: 57).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3E7 (e.g., SEQ ID NO: 32); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3E7 (e.g., SEQ ID NO: 33); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3E7 (e.g., SEQ ID NO: 31), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3E7 (e.g., SEQ ID NO: 55); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3E7 (e.g., SEQ ID NO: 56); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3E7 (e.g., SEQ ID NO: 57).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3E7 (e.g., SEQ ID NO: 32); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3E7 (e.g., SEQ ID NO: 33); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3E7 (e.g., SEQ ID NO: 31), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3E7 (e.g., SEQ ID NO: 55); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3E7 (e.g., SEQ ID NO: 56); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3E7 (e.g., SEQ ID NO: 57).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 3E7 (e.g., SEQ ID NO: 29); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 3E7 (e.g., SEQ ID NO: 30); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 3E7 (e.g., SEQ ID NO: 31).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3E7 (e.g., SEQ ID NO: 29); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3E7 (e.g., SEQ ID NO: 30); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3E7 (e.g., SEQ ID NO: 31). In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3E7 (e.g., SEQ ID NO: 29); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3E7 (e.g., SEQ ID NO: 30); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3E7 (e.g., SEQ ID NO: 31).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 3E7 (e.g., SEQ ID NO: 55); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 3E7 (e.g., SEQ ID NO: 56); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 3E7 (e.g., SEQ ID NO: 57).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3E7 (e.g., SEQ ID NO: 55); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3E7 (e.g., SEQ ID NO: 56); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3E7 (e.g., SEQ ID NO: 57).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3E7 (e.g., SEQ ID NO: 55); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3E7 (e.g., SEQ ID NO: 56); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3E7 (e.g., SEQ ID NO: 57).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 3E7 (e.g., SEQ ID NO: 29); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 3E7 (e.g., SEQ ID NO: 30); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 3E7 (e.g., SEQ ID NO: 31), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 3E7 (e.g., SEQ ID NO: 55); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 3E7 (e.g., SEQ ID NO: 56); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 3E7 (e.g., SEQ ID NO: 57).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3E7 (e.g., SEQ ID NO: 29); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3E7 (e.g., SEQ ID NO: 30); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3E7 (e.g., SEQ ID NO: 31), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3E7 (e.g., SEQ ID NO: 55); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3E7 (e.g., SEQ ID NO: 56); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3E7 (e.g., SEQ ID NO: 57).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3E7 (e.g., SEQ ID NO: 29); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3E7 (e.g., SEQ ID NO: 30); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3E7 (e.g., SEQ ID NO: 31), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3E7 (e.g., SEQ ID NO: 55); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3E7 (e.g., SEQ ID NO: 56); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3E7 (e.g., SEQ ID NO: 57).

In an embodiment, the antibody molecule further comprises one or more human or human derived heavy or light chain variable region frameworks.

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of 3E7 (e.g., SEQ ID NO: 4). In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of 3E7 (e.g., SEQ ID NO: 4).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of 3E7 (e.g., SEQ ID NO: 10). In an embodiment, the light chain variable region comprises the amino acid sequence of the VL of 3E7 (e.g., SEQ ID NO: 10).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of 3E7 (e.g., SEQ ID NO: 4), and wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of 3E7 (e.g., SEQ ID NO: 10).

In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of 3E7 (e.g., SEQ ID NO: 4), and wherein the light chain variable region comprises the amino acid sequence of the VL of 3E7 (e.g., SEQ ID NO: 10).

In an embodiment, the heavy chain variable region comprises an amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 84). In an embodiment, the light chain variable region comprises and amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 90).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 3G1 (e.g., SEQ ID NO: 37); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 3G1 (e.g., SEQ ID NO: 38); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 3G1 (e.g., SEQ ID NO: 36).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3G1 (e.g., SEQ ID NO: 37); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3G1 (e.g., SEQ ID NO: 38); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3G1 (e.g., SEQ ID NO: 36).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3G1 (e.g., SEQ ID NO: 37); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3G1 (e.g., SEQ ID NO: 38); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3G1 (e.g., SEQ ID NO: 36).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 3G1 (e.g., SEQ ID NO: 58); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 3G1 (e.g., SEQ ID NO: 59); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 3G1 (e.g., SEQ ID NO: 60).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3G1 (e.g., SEQ ID NO: 58); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3G1 (e.g., SEQ ID NO: 59); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3G1 (e.g., SEQ ID NO: 60).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3G1 (e.g., SEQ ID NO: 58); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3G1 (e.g., SEQ ID NO: 59); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3G1 (e.g., SEQ ID NO: 60).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 3G1 (e.g., SEQ ID NO: 37); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 3G1 (e.g., SEQ ID NO: 38); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 3G1 (e.g., SEQ ID NO: 36), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 3G1 (e.g., SEQ ID NO: 58); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 3G1 (e.g., SEQ ID NO: 59); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 3G1 (e.g., SEQ ID NO: 60).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3G1 (e.g., SEQ ID NO: 37); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3G1 (e.g., SEQ ID NO: 38); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3G1 (e.g., SEQ ID NO: 36), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3G1 (e.g., SEQ ID NO: 58); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3G1 (e.g., SEQ ID NO: 59); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3G1 (e.g., SEQ ID NO: 60).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3G1 (e.g., SEQ ID NO: 37); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3G1 (e.g., SEQ ID NO: 38); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3G1 (e.g., SEQ ID NO: 36), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3G1 (e.g., SEQ ID NO: 58); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3G1 (e.g., SEQ ID NO: 59); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3G1 (e.g., SEQ ID NO: 60).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 3G1 (e.g., SEQ ID NO: 34); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 3G1 (e.g., SEQ ID NO: 35); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 3G1 (e.g., SEQ ID NO: 36).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3G1 (e.g., SEQ ID NO: 34); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3G1 (e.g., SEQ ID NO: 35); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3G1 (e.g., SEQ ID NO: 36).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3G1 (e.g., SEQ ID NO: 34); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3G1 (e.g., SEQ ID NO: 35); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3G1 (e.g., SEQ ID NO: 36).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 3G1 (e.g., SEQ ID NO: 58); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 3G1 (e.g., SEQ ID NO: 59); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 3G1 (e.g., SEQ ID NO: 60).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3G1 (e.g., SEQ ID NO: 58); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3G1 (e.g., SEQ ID NO: 59); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3G1 (e.g., SEQ ID NO: 60).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3G1 (e.g., SEQ ID NO: 58); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3G1 (e.g., SEQ ID NO: 59); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3G1 (e.g., SEQ ID NO: 60).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 3G1 (e.g., SEQ ID NO: 34); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 3G1 (e.g., SEQ ID NO: 35); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 3G1 (e.g., SEQ ID NO: 36), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 3G1 (e.g., SEQ ID NO: 58); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 3G1 (e.g., SEQ ID NO: 59); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 3G1 (e.g., SEQ ID NO: 60).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3G1 (e.g., SEQ ID NO: 34); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3G1 (e.g., SEQ ID NO: 35); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3G1 (e.g., SEQ ID NO: 36), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3G1 (e.g., SEQ ID NO: 58); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3G1 (e.g., SEQ ID NO: 59); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3G1 (e.g., SEQ ID NO: 60).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3G1 (e.g., SEQ ID NO: 34); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3G1 (e.g., SEQ ID NO: 35); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3G1 (e.g., SEQ ID NO: 36), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3G1 (e.g., SEQ ID NO: 58); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3G1 (e.g., SEQ ID NO: 59); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3G1 (e.g., SEQ ID NO: 60).

In an embodiment, the antibody molecule further comprises one or more human or human derived heavy or light chain variable region frameworks.

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of 3G1 (e.g., SEQ ID NO: 5). In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of 3G1 (e.g., SEQ ID NO: 5).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of 3G1 (e.g., SEQ ID NO: 11). In an embodiment, the light chain variable region comprises the amino acid sequence of the VL of 3G1 (e.g., SEQ ID NO: 11).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of 3G1 (e.g., SEQ ID NO: 5), and wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of 3G1 (e.g., SEQ ID NO: 11).

In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of 3G1 (e.g., SEQ ID NO: 5), and wherein the light chain variable region comprises the amino acid sequence of the VL of 3G1 (e.g., SEQ ID NO: 11).

In an embodiment, the heavy chain variable region comprises an amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 85). In an embodiment, the light chain variable region comprises and amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 91).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 2C7 (e.g., SEQ ID NO: 42); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 2C7 (e.g., SEQ ID NO: 43); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 2C7 (e.g., SEQ ID NO: 41).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 2C7 (e.g., SEQ ID NO: 42); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 2C7 (e.g., SEQ ID NO: 43); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 2C7 (e.g., SEQ ID NO: 41).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 2C7 (e.g., SEQ ID NO: 42); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 2C7 (e.g., SEQ ID NO: 43); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 2C7 (e.g., SEQ ID NO: 41).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 2C7 (e.g., SEQ ID NO: 61); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 2C7 (e.g., SEQ ID NO: 62); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 2C7 (e.g., SEQ ID NO: 63).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 2C7 (e.g., SEQ ID NO: 61); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 2C7 (e.g., SEQ ID NO: 62); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 2C7 (e.g., SEQ ID NO: 63).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 2C7 (e.g., SEQ ID NO: 61); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 2C7 (e.g., SEQ ID NO: 62); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 2C7 (e.g., SEQ ID NO: 63).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 2C7 (e.g., SEQ ID NO: 42); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 2C7 (e.g., SEQ ID NO: 43); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 2C7 (e.g., SEQ ID NO: 41), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 2C7 (e.g., SEQ ID NO: 61); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 2C7 (e.g., SEQ ID NO: 62); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 2C7 (e.g., SEQ ID NO: 63). In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 2C7 (e.g., SEQ ID NO: 42); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 2C7 (e.g., SEQ ID NO: 43); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 2C7 (e.g., SEQ ID NO: 41), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 2C7 (e.g., SEQ ID NO: 61); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 2C7 (e.g., SEQ ID NO: 62); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 2C7 (e.g., SEQ ID NO: 63).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 2C7 (e.g., SEQ ID NO: 42); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 2C7 (e.g., SEQ ID NO: 43); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 2C7 (e.g., SEQ ID NO: 41), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 2C7 (e.g., SEQ ID NO: 61); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 2C7 (e.g., SEQ ID NO: 62); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 2C7 (e.g., SEQ ID NO: 63).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 2C7 (e.g., SEQ ID NO: 39); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 2C7 (e.g., SEQ ID NO: 40); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 2C7 (e.g., SEQ ID NO: 41).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 2C7 (e.g., SEQ ID NO: 39); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 2C7 (e.g., SEQ ID NO: 40); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 2C7 (e.g., SEQ ID NO: 41).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 2C7 (e.g., SEQ ID NO: 39); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 2C7 (e.g., SEQ ID NO: 40); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 2C7 (e.g., SEQ ID NO: 41).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 2C7 (e.g., SEQ ID NO: 61); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 2C7 (e.g., SEQ ID NO: 62); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 2C7 (e.g., SEQ ID NO: 63).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 2C7 (e.g., SEQ ID NO: 61); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 2C7 (e.g., SEQ ID NO: 62); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 2C7 (e.g., SEQ ID NO: 63).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 2C7 (e.g., SEQ ID NO: 61); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 2C7 (e.g., SEQ ID NO: 62); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 2C7 (e.g., SEQ ID NO: 63).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 2C7 (e.g., SEQ ID NO: 39); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 2C7 (e.g., SEQ ID NO: 40); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 2C7 (e.g., SEQ ID NO: 41), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 2C7 (e.g., SEQ ID NO: 61); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 2C7 (e.g., SEQ ID NO: 62); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 2C7 (e.g., SEQ ID NO: 63).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 2C7 (e.g., SEQ ID NO: 39); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 2C7 (e.g., SEQ ID NO: 40); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 2C7 (e.g., SEQ ID NO: 41), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 2C7 (e.g., SEQ ID NO: 61); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 2C7 (e.g., SEQ ID NO: 62); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 2C7 (e.g., SEQ ID NO: 63).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 2C7 (e.g., SEQ ID NO: 39); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 2C7 (e.g., SEQ ID NO: 40); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 2C7 (e.g., SEQ ID NO: 41), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 2C7 (e.g., SEQ ID NO: 61); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 2C7 (e.g., SEQ ID NO: 62); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 2C7 (e.g., SEQ ID NO: 63).

In an embodiment, the antibody molecule further comprises one or more human or human derived heavy or light chain variable region frameworks.

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of 2C7 (e.g., SEQ ID NO: 6). In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of 2C7 (e.g., SEQ ID NO: 6).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of 2C7 (e.g., SEQ ID NO: 12). In an embodiment, the light chain variable region comprises the amino acid sequence of the VL of 2C7 (e.g., SEQ ID NO: 12).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of 2C7 (e.g., SEQ ID NO: 6), and wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of 2C7 (e.g., SEQ ID NO: 12).

In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of 2C7 (e.g., SEQ ID NO: 6), and wherein the light chain variable region comprises the amino acid sequence of the VL of 2C7 (e.g., SEQ ID NO: 12).

In an embodiment, the heavy chain variable region comprises an amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 86). In an embodiment, the light chain variable region comprises and amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 92).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 3D6 (e.g., SEQ ID NO: 47); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 3D6 (e.g., SEQ ID NO: 48); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 3D6 (e.g., SEQ ID NO: 46).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3D6 (e.g., SEQ ID NO: 47); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3D6 (e.g., SEQ ID NO: 48); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3D6 (e.g., SEQ ID NO: 46).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3D6 (e.g., SEQ ID NO: 47); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3D6 (e.g., SEQ ID NO: 48); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3D6 (e.g., SEQ ID NO: 46).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 3D6 (e.g., SEQ ID NO: 64); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 3D6 (e.g., SEQ ID NO: 65); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 3D6 (e.g., SEQ ID NO: 66).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3D6 (e.g., SEQ ID NO: 64); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3D6 (e.g., SEQ ID NO: 65); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3D6 (e.g., SEQ ID NO: 66).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3D6 (e.g., SEQ ID NO: 64); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3D6 (e.g., SEQ ID NO: 65); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3D6 (e.g., SEQ ID NO: 66).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 3D6 (e.g., SEQ ID NO: 47); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 3D6 (e.g., SEQ ID NO: 48); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 3D6 (e.g., SEQ ID NO: 46), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 3D6 (e.g., SEQ ID NO: 64); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 3D6 (e.g., SEQ ID NO: 65); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 3D6 (e.g., SEQ ID NO: 66).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3D6 (e.g., SEQ ID NO: 47); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3D6 (e.g., SEQ ID NO: 48); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3D6 (e.g., SEQ ID NO: 46), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3D6 (e.g., SEQ ID NO: 64); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3D6 (e.g., SEQ ID NO: 65); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3D6 (e.g., SEQ ID NO: 66).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3D6 (e.g., SEQ ID NO: 47); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3D6 (e.g., SEQ ID NO: 48); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3D6 (e.g., SEQ ID NO: 46), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3D6 (e.g., SEQ ID NO: 64); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3D6 (e.g., SEQ ID NO: 65); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3D6 (e.g., SEQ ID NO: 66).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 3D6 (e.g., SEQ ID NO: 44); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 3D6 (e.g., SEQ ID NO: 45); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 3D6 (e.g., SEQ ID NO: 46).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3D6 (e.g., SEQ ID NO: 44); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3D6 (e.g., SEQ ID NO: 45); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3D6 (e.g., SEQ ID NO: 46). In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3D6 (e.g., SEQ ID NO: 44); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3D6 (e.g., SEQ ID NO: 45); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3D6 (e.g., SEQ ID NO: 46).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 3D6 (e.g., SEQ ID NO: 64); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 3D6 (e.g., SEQ ID NO: 65); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 3D6 (e.g., SEQ ID NO: 66).

In an embodiment, the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3D6 (e.g., SEQ ID NO: 64); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3D6 (e.g., SEQ ID NO: 65); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3D6 (e.g., SEQ ID NO: 66).

In an embodiment, the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3D6 (e.g., SEQ ID NO: 64); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3D6 (e.g., SEQ ID NO: 65); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3D6 (e.g., SEQ ID NO: 66).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of antibody 3D6 (e.g., SEQ ID NO: 44); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of antibody 3D6 (e.g., SEQ ID NO: 45); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of antibody 3D6 (e.g., SEQ ID NO: 46), and wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of antibody 3D6 (e.g., SEQ ID NO: 64); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of antibody 3D6 (e.g., SEQ ID NO: 65); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of antibody 3D6 (e.g., SEQ ID NO: 66).

In an embodiment, the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3D6 (e.g., SEQ ID NO: 44); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3D6 (e.g., SEQ ID NO: 45); or an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3D6 (e.g., SEQ ID NO: 46), and the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3D6 (e.g., SEQ ID NO: 64); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3D6 (e.g., SEQ ID NO: 65); or an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3D6 (e.g., SEQ ID NO: 66).

In an embodiment, the heavy chain variable region comprises an HCDR1 comprising the amino acid sequence of the HCDR1 of antibody 3D6 (e.g., SEQ ID NO: 44); an HCDR2 comprising the amino acid sequence of the HCDR2 of antibody 3D6 (e.g., SEQ ID NO: 45); and an HCDR3 comprising the amino acid sequence of the HCDR3 of antibody 3D6 (e.g., SEQ ID NO: 46), and the light chain variable region comprises an LCDR1 comprising the amino acid sequence of the LCDR1 of antibody 3D6 (e.g., SEQ ID NO: 64); an LCDR2 comprising the amino acid sequence of the LCDR2 of antibody 3D6 (e.g., SEQ ID NO: 65); and an LCDR3 comprising the amino acid sequence of the LCDR3 of antibody 3D6 (e.g., SEQ ID NO: 66).

In an embodiment, the antibody molecule further comprises one or more human or human derived heavy or light chain variable region frameworks.

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of 3D6 (e.g., SEQ ID NO: 7). In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of 3D6 (e.g., SEQ ID NO: 7).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of 3D6 (e.g., SEQ ID NO: 13). In an embodiment, the light chain variable region comprises the amino acid sequence of the VL of 3D6 (e.g., SEQ ID NO: 13).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the heavy chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VH of 3D6 (e.g., SEQ ID NO: 7), and wherein the light chain variable region comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of the VL of 3D6 (e.g., SEQ ID NO: 13).

In an embodiment, the heavy chain variable region comprises the amino acid sequence of the VH of 3D6 (e.g., SEQ ID NO: 7), and wherein the light chain variable region comprises the amino acid sequence of the VL of 3D6 (e.g., SEQ ID NO: 13).

In an embodiment, the heavy chain variable region comprises an amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 87). In an embodiment, the light chain variable region comprises and amino acid sequence encoded by a nucleotide sequence from Table 2 (e.g., SEQ ID NO: 93).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the VH comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the VH comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118).

In an embodiment, the VH comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); an HCDR2 comprising the amino acid sequence of the HCDR2 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); or an HCDR3 comprising the amino acid sequence of the HCDR3 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118).

In an embodiment, the VH comprises: an HCDR1 comprising the amino acid sequence of the HCDR1 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); an HCDR2 comprising the amino acid sequence of the HCDR2 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); and an HCDR3 comprising the amino acid sequence of the HCDR3 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the VL comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the VL comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137).

In an embodiment, the VL comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137); an LCDR2 comprising the amino acid sequence of the LCDR2 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137); or an LCDR3 comprising the amino acid sequence of the LCDR3 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137).

In an embodiment, the VL comprises: an LCDR1 comprising the amino acid sequence of the LCDR1 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137); an LCDR2 comprising the amino acid sequence of the LCDR2 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137); and an LCDR3 comprising the amino acid sequence of the LCDR3 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the VH comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the VL comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the VH comprises one, two, or all of the following: an HCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR1 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); an HCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR2 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); or an HCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the HCDR3 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); and wherein the VL comprises one, two, or all of the following: an LCDR1 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR1 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137); an LCDR2 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR2 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137); or an LCDR3 comprising an amino acid sequence that differs by no more than 1, 2, or 3 amino acid residues from, or has at least 85, 90, 95, 99 or 100% homology with, the amino acid sequence of the LCDR3 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137).

In an embodiment, the VH comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of the HCDR1 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); an HCDR2 comprising the amino acid sequence of the HCDR2 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); or an HCDR3 comprising the amino acid sequence of the HCDR3 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); and the VL comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of the LCDR1 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137); an LCDR2 comprising the amino acid sequence of the LCDR2 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137); or an LCDR3 comprising the amino acid sequence of the LCDR3 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137).

In an embodiment, the VH comprises: an HCDR1 comprising the amino acid sequence of the HCDR1 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); an HCDR2 comprising the amino acid sequence of the HCDR2 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); and an HCDR3 comprising the amino acid sequence of the HCDR3 of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118); and the VL comprises: an LCDR1 comprising the amino acid sequence of the LCDR1 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137); an LCDR2 comprising the amino acid sequence of the LCDR2 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137); and an LCDR3 comprising the amino acid sequence of the LCDR3 of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137).

In an embodiment, the antibody molecule further comprises one or more human or human derived heavy or light chain variable region frameworks.

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the VH comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118). In an embodiment, the VH comprises the amino acid sequence of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118).

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the VL comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137). In an embodiment, the VL comprises the amino acid sequence of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH) and a light chain variable region (VL), wherein the VH comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118), and wherein the VL comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137). In an embodiment, the VH comprises the amino acid sequence of a VH described in Table 8 (e.g., any of SEQ ID NOS: 115-118), and the VL comprises the amino acid sequence of a VL described in Table 8 (e.g., any of SEQ ID NOS: 119-137).

In an embodiment, the HCCDR1, HCCDR2, and HCCDR3 are from the same VH described in Table 8. In an embodiment, the LCCDR1, LCCDR2, and LCCDR3 are from the same VL described in Table 8.

Any of the VH amino acid sequences (or the amino acid sequences of HCDR1, HCDR2, and HCDR3 thereof) disclosed in Table 8 (or a sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues therefrom, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology therewith) can be combined with any of the VL amino acid sequences (or the amino acid sequences of LCDR1, LCDR2, and LCDR3 thereof) disclosed in Table 8 (or a sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues therefrom, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology therewith), e.g., to form a humanized antibody molecule. Exemplary combinations include:

SEQ ID NOS: 103 and 104; SEQ ID NOS: 103 and 119; SEQ ID NOS: 103 and 120; SEQ ID NOS: 103 and 121; SEQ ID NOS: 103 and 122; SEQ ID NOS: 103 and 123; SEQ ID NOS: 103 and 124; SEQ ID NOS: 103 and 125; SEQ ID NOS: 103 and 126; SEQ ID NOS: 103 and 127; SEQ ID NOS: 103 and 128; SEQ ID NOS: 103 and 129; SEQ ID NOS: 103 and 130; SEQ ID NOS: 103 and 131; SEQ ID NOS: 103 and 132; SEQ ID NOS: 103 and 133; SEQ ID NOS: 103 and 134; SEQ ID NOS: 103 and 135; SEQ ID NOS: 103 and 136; SEQ ID NOS: 103 and 137; SEQ ID NOS: 115 and 104; SEQ ID NOS: 115 and 119; SEQ ID NOS: 115 and 120; SEQ ID NOS: 115 and 121; SEQ ID NOS: 115 and 122; SEQ ID NOS: 115 and 123; SEQ ID NOS: 115 and 124; SEQ ID NOS: 115 and 125; SEQ ID NOS: 115 and 126; SEQ ID NOS: 115 and 127; SEQ ID NOS: 115 and 128; SEQ ID NOS: 115 and 129; SEQ ID NOS: 115 and 130; SEQ ID NOS: 115 and 131; SEQ ID NOS: 115 and 132; SEQ ID NOS: 115 and 133; SEQ ID NOS: 115 and 134; SEQ ID NOS: 115 and 135; SEQ ID NOS: 115 and 136; SEQ ID NOS: 115 and 137; SEQ ID NOS: 116 and 104; SEQ ID NOS: 116 and 119; SEQ ID NOS: 116 and 120; SEQ ID NOS: 116 and 121; SEQ ID NOS: 116 and 122; SEQ ID NOS: 116 and 123; SEQ ID NOS: 116 and 124; SEQ ID NOS: 116 and 125; SEQ ID NOS: 116 and 126; SEQ ID NOS: 116 and 127; SEQ ID NOS: 116 and 128; SEQ ID NOS: 116 and 129; SEQ ID NOS: 116 and 130; SEQ ID NOS: 116 and 131; SEQ ID NOS: 116 and 132; SEQ ID NOS: 116 and 133; SEQ ID NOS: 116 and 134; SEQ ID NOS: 116 and 135; SEQ ID NOS: 116 and 136; SEQ ID NOS: 116 and 137; SEQ ID NOS: 117 and 104; SEQ ID NOS: 117 and 119; SEQ ID NOS: 117 and 120; SEQ ID NOS: 117 and 121; SEQ ID NOS: 117 and 122; SEQ ID NOS: 117 and 123; SEQ ID NOS: 117 and 124; SEQ ID NOS: 117 and 125; SEQ ID NOS: 117 and 126; SEQ ID NOS: 117 and 127; SEQ ID NOS: 117 and 128; SEQ ID NOS: 117 and 129; SEQ ID NOS: 117 and 130; SEQ ID NOS: 117 and 131; SEQ ID NOS: 117 and 132; SEQ ID NOS: 117 and 133; SEQ ID NOS: 117 and 134; SEQ ID NOS: 117 and 135; SEQ ID NOS: 117 and 136; SEQ ID NOS: 117 and 137; SEQ ID NOS: 118 and 104; SEQ ID NOS: 118 and 119; SEQ ID NOS: 118 and 120; SEQ ID NOS: 118 and 121; SEQ ID NOS: 118 and 122; SEQ ID NOS: 118 and 123; SEQ ID NOS: 118 and 124; SEQ ID NOS: 118 and 125; SEQ ID NOS: 118 and 126; SEQ ID NOS: 118 and 127; SEQ ID NOS: 118 and 128; SEQ ID NOS: 118 and 129; SEQ ID NOS: 118 and 130; SEQ ID NOS: 118 and 131; SEQ ID NOS: 118 and 132; SEQ ID NOS: 118 and 133; SEQ ID NOS: 118 and 134; SEQ ID NOS: 118 and 135; SEQ ID NOS: 118 and 136; or SEQ ID NOS: 118 and 137.

In an embodiment, the ADC or antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), wherein the heavy chain variable region comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of SEQ ID NO: 108; an HCDR2 comprising the amino acid sequence of YISSDGDSX₁YYPD X₂ X₃KG (SEQ ID NO: 165), wherein X₁ is I or T; X₂ is N or S; X₃ is I or V; or an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107.

In an embodiment, the ADC or antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the light chain variable region comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of RASESX₁FGHGISPX₂H (SEQ ID NO: 166), wherein X₁ is V or I; X₂ is M or L; an LCDR2 comprising the amino acid sequence of RASX₁X₂KX₃ (SEQ ID NO: 167), wherein X₁ is N or S; X₂ is L or R; X₃ is F, T or S; or an LCDR3 comprising the amino acid sequence of SEQ ID NO: 112.

In an embodiment, the ADC or antibody molecule comprises a VH and a VL, wherein the VH comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the VL comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3),

wherein the VH comprises one, two, or all of the following: an HCDR1 comprising the amino acid sequence of SEQ ID NO: 108; an HCDR2 comprising the amino acid sequence of YISSDGDSX₁YYPD X₂ X₃KG (SEQ ID NO: 165), wherein X₁ is I or T; X₂ is N or S; X₃ is I or V; or an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107, and

wherein the VL comprises one, two, or all of the following: an LCDR1 comprising the amino acid sequence of RASESX₁FGHGISPX₂H (SEQ ID NO: 166), wherein X₁ is V or I; X₂ is M or L; an LCDR2 comprising the amino acid sequence of RASX₁X₂KX₃ (SEQ ID NO: 167), wherein X₁ is N or S; X₂ is L or R; X₃ is F, T or S; or an LCDR3 comprising the amino acid sequence of SEQ ID NO: 112.

In an embodiment, the ADC or antibody molecule comprises a VH and a VL, wherein the VH comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the VL comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3),

wherein the VH comprises: an HCDR1 comprising the amino acid sequence of SEQ ID NO: 108; an HCDR2 comprising the amino acid sequence of YISSDGDSX₁YYPD X₂ X₃KG (SEQ ID NO: 165), wherein X₁ is I or T; X₂ is N or S; X₃ is I or V; and an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107, and

wherein the VL comprises: an LCDR1 comprising the amino acid sequence of RASESX₁FGHGISPX₂H (SEQ ID NO: 166), wherein X₁ is V or I; X₂ is M or L; an LCDR2 comprising the amino acid sequence of RASX₁X₂KX₃ (SEQ ID NO: 167), wherein X₁ is N or S; X₂ is L or R; X₃ is F, T or S; and an LCDR3 comprising the amino acid sequence of SEQ ID NO: 112.

In an embodiment, the antibody molecule comprises or consists of two heavy chain variable regions and two light chain variable regions.

In an embodiment, the antibody molecule further comprises a heavy chain constant region, a light chain constant region, or both.

In an embodiment, the antibody molecule is an IgG antibody molecule, e.g., IgG1, IgG2, IgG3, or IgG4 antibody molecule. In an embodiment, the antibody molecule is not an IgM antibody molecule.

In an embodiment, the antibody molecule comprises a light chain constant region from a kappa or lambda light chain.

In an embodiment, the antibody molecule is capable of binding to two or more Gram-negative strains. Antibody molecules capable of binding to two or more Gram-negative bacterial strains have several advantageous properties. For example, one therapy can be used to treat, prevent, or diagnose multiple bacterial infections. In addition, a physician need not determine which bacterial strain infected a patient in order to determine the appropriate therapy.

According, in an embodiment, the antibody molecule binds to one or more bacteria, e.g., one or more Gram-negative bacteria, e.g., of different genera, species, subspecies, and/or strains.

In an embodiment, the one or more Gram-negative bacteria are selected from a species of Enterobacteriaceae (e.g., a species in Klebsiella, Enterobacter, Shigella, Escherichia, Salmonella, Yersinia, or Citrobacter, e.g., pan-resistant Enterobacteriaceae), a species of Pseudomonas, a species of Acinetobacter, or any combination thereof.

In an embodiment, the antibody molecule binds to one or more of: Klebsiella pneumonia (e.g., Klebsiella pneumoniae subsp. ozaenae, Klebsiella pneumoniae subsp. pneumoniae, or Klebsiella pneumoniae subsp. rhinoscleromatis), Enterobacter cancerogenous, Enterobacter cloacae, Enterobacter hormaechei, Enterobacter asburiae, Shigella boydii, Shigella dysenteriae, Shigella flexneri, Shigella sonnei, Escherichia coli (e.g., Escherichia coli ATCC 11775, Escherichia coli ATCC 25922, Escherichia coli ATCC 35401, or Escherichia coli ATCC 43895), Escherichia fergusonii, Salmonella choleraesuis, Salmonella choleraesuis subsp. indica, Salmonella enteritidis, Salmonella virchow, Salmonella paratyphi B, Salmonella typhimurium, Salmonella paratyphi A, Salmonella typhi, Salmonella choleraesuis subsp. arizonae, Salmonella choleraesuis subsp. diarizonae, Salmonella choleraesuis subsp. houtenae, Salmonella bongori, Citrobacter sedlakii, Citrobacter braakii, Citrobacter werkmanii, Citrobacter freundii, Citrobacter youngae, Citrobacter amalonaticus, Yersinia enterocolitica, Yersinia frederiksenii, Yersinia pestis, Yersinia pseudotuberculosis, or any combination thereof.

In an embodiment, the one or more bacteria are one or more antibiotic-resistant bacteria, e.g., one or more multidrug-resistant Gram-negative bacteria.

In an embodiment, the one or more antibiotic-resistant bacteria are selected from Pseudomonas (e.g., P. aeruginosa), Enterobacteriaceae (e.g., Klebsiella pneumonia or E. coli), or Acinetobacter (e.g., A. baumannii).

In an embodiment, the antibody molecule binds to one or more of: Enterococcus faecium (e.g., vancomycin-resistant (VRE) Enterococcus faecium), Staphylococcus aureus (e.g., methicillin-resistant (MRSA) Staphylococcus aureus), Clostridium difficile, Acinetobacter baumannii (e.g., multidrug resistant (MDR) Acinetobacter), Pseudomonas aeruginosa (e.g., multidrug resistant (MDR) P. aeruginosa, e.g., carbapenem-resistant P. aeruginosa), Enterobacteriaceae (e.g., E. coli, K. pneumoniae, or Enterobacter spp., e.g., carbapenem-resistant Enterobacteriaceae (CRE)), N. gonorrhoaeae (e.g., drug-resistant N. gonorrhoaeae), Salmonella (e.g., drug resistant Salmonella), Shigella (e.g., drug-resistant Shigella), a bacterium producing an extended spectrum β-lactamase (ESBL), or Mycobacterium tuberculosis (e.g., drug-resistant M. tuberculosis).

In an embodiment, the antibody molecule binds to one or more (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, or all) P. aeruginosa strains in Table 7. In another embodiment, the antibody molecule binds to one or more (e.g., 2, 3, 4, 5, 6, or all) multidrug-resistant P. aeruginosa strains in Table 7.

In an embodiment, the antibody molecule binds to LPS with high affinity, e.g., with a K_(D) that is less than about 10 nM, e.g., measured by an ELISA method.

In an embodiment, the antibody molecule binds to LPS with a K_(off) slower than 1×10⁴, 5×10⁵, or 1×10⁻⁵ s⁻¹. In an embodiment, the antibody molecule binds to LPS with a K_(on) faster than 1×10⁴, 5×10⁴, 1×10⁵, or 5×10⁵ M⁻¹ s⁻¹.

In an embodiment, the antibody molecule has opsonophagocytic activity, e.g., as determined by an OPA assay, e.g., as described herein.

In an embodiment, the antibody molecule binds to an epitope comprising one or more (e.g., two) Kdo residues and/or one or more (e.g., two or three) Hep residues in LPS.

In an embodiment, a) the antibody molecule that binds to lipopolysaccharide (LPS) is coupled (e.g., fused) to b) the antimicrobial peptide, e.g., an antimicrobial peptide described herein, e.g., to form an antibody molecule-drug conjugate (ADC).

In an embodiment, the antibody molecule comprises a heavy chain variable region (VH), wherein the heavy chain variable region is coupled (e.g., fused) to the antimicrobial peptide, e.g., wherein the heavy chain variable region is N-terminal to the antimicrobial peptide.

In an embodiment, the heavy chain variable region is coupled (e.g., fused) to the antimicrobial peptide indirectly, e.g., wherein the C-terminus of the heavy chain variable region is coupled (e.g., fused) to the N-terminus of the antimicrobial peptide via a constant region.

In an embodiment, the antibody molecule comprises a light chain variable region (VL), wherein the light chain variable region is coupled (e.g., fused) to the antimicrobial peptide, e.g., wherein the light chain variable region is N-terminal to the antimicrobial peptide.

In an embodiment, the light chain variable region is coupled (e.g., fused) to the antimicrobial peptide indirectly, e.g., wherein the C-terminus of the light chain variable region is coupled (e.g., fused) to the N-terminus of the antimicrobial peptide via a constant region.

In an embodiment, the antibody molecule is coupled (e.g., fused) to two or more (e.g., three, four, five, six, seven, eight, or more, e.g., four) antimicrobial peptides, e.g., by enzymatic conjugation or chemical conjugation. In an embodiment, at least two of the antimicrobial peptides are identical. In an embodiment, at least two of the antimicrobial peptides are different.

In an embodiment, the antibody molecule is coupled (e.g., fused) to two identical antimicrobial peptides, each is coupled (e.g., fused) to a heavy chain variable region, e.g., indirectly, e.g., via a constant region.

In an embodiment, the antimicrobial peptide coupled (e.g., fused) to the antibody molecule is more effective in inhibiting, e.g., inhibiting the growth, virulence, or infectivity of, a Gram-negative bacterium (e.g., a Gram-negative bacterium described herein) than the antimicrobial peptide or antibody molecule alone, e.g., having a minimum inhibitory concentration (MIC) that is lower, e.g., at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 fold lower, than the MIC of the antimicrobial peptide alone.

In an embodiment, the antimicrobial peptide coupled (e.g., fused) to the antibody molecule is more effective in reducing the viability of, e.g., killing, a Gram-negative bacterium (e.g., a Gram-negative bacterium described herein) than the antimicrobial peptide or antibody molecule alone, e.g., having a minimum bactericidal concentration (MBC) that is lower, e.g., at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 fold lower, than the MBC of the antimicrobial peptide alone.

In an embodiment, the antibody molecule has opsonophagocytic activity (e.g., is phagocytized when bound to the Fc receptor (FcR) of a neutrophil), e.g., as determined by an OPA assay, e.g., as described herein.

In an embodiment, the antimicrobial peptide coupled (e.g., fused) to the antibody molecule does not inhibit, e.g., does not inhibit the growth, virulence, or infectivity of, a Gram-positive bacterium (e.g., a Gram-positive bacterium described herein), e.g., having a minimum inhibitory concentration (MIC) for a Gram-negative bacterium (e.g., a Gram-negative bacterium) that is lower, e.g., at least 2, 5, 10, 20, 50, 100, 200, 500, or 1000 fold lower, than a MIC for a Gram-positive bacterium (e.g., a Gram-positive bacterium).

In an embodiment, the antimicrobial peptide coupled (e.g., fused) to the antibody molecule does not reduce the viability of, e.g., does not kill, a Gram-positive bacterium (e.g., a Gram-positive bacterium described herein), e.g., having a minimum bactericidal concentration (MBC) for a Gram-negative bacterium (e.g., a Gram-negative bacterium) that is lower, e.g., at least 2, 5, 10, 20, 50, 100, 200, 500, or 1000 fold lower fold lower, than a MBC for a Gram-positive bacterium (e.g., a Gram-positive bacterium).

In an embodiment, the Gram-positive bacterium is Staphylococcus aureus.

In an embodiment, the antibody molecule binds to a linear or conformational epitope on a Gram-negative bacterium or on LPS.

Antimicrobial Peptides

As used herein, the term “antimicrobial peptide” refers to a peptide that has an antimicrobial activity, e.g., an antibacterial activity. While not wishing to be bound by theory, it is believed that, in an embodiment, the antimicrobial peptides can have variable length, sequence and structure with broad spectrum activity against a number of microorganisms, e.g., bacteria, and optionally low levels of induced resistance. In an embodiment, the antimicrobial peptide is an antibacterial peptide.

Antimicrobial peptides are a diverse group of molecules, which are divided into subgroups on the basis of their amino acid composition and structure. Typically, these peptides include two or more positively charged residues provided by arginine, lysine or, in acidic environments, histidine, and a large proportion (e.g., more than 50%) of hydrophobic residues. The secondary structures of these molecules include, e.g., i) α-helical, ii) β-stranded due to the presence of 2 or more disulfide bonds, iii) β-hairpin or loop due to the presence of a single disulfide bond and/or cyclization of the peptide chain, and iv) extended. Some of these peptides can be unstructured in free solution, and fold into their final configuration upon partitioning into biological membranes. Antimicrobial peptides can contain hydrophilic amino acid residues aligned along one side and hydrophobic amino acid residues aligned along the opposite side of a helical molecule. This amphipathicity of the antimicrobial peptides allows them to partition into the membrane lipid bilayer. While not wishing to be bound by theory, it is believed that in an embodiment, the ability to associate with membranes is a typical feature of antimicrobial peptides although membrane permeabilization may not be required.

Types of antimicrobial peptides include, e.g., anionic peptides (e.g., rich in glutamic and aspartic acids), linear cationic α-helical peptides (e.g., lacking cysteine), cationic peptides (e.g., rich in proline, arginine, phenylalanine, glycine, or tryptophan), and anionic and cationic peptides that contain cysteine and form disulfide bonds (e.g., containing 1-3 disulfide bonds).

The modes of action by which antimicrobial peptides kill microbes are varied, and may differ for different bacterial species. The cytoplasmic membrane is a frequent target, but peptides may also interfere with DNA and protein synthesis, protein folding, and cell wall synthesis. The initial contact between the peptide and the target organism can be electrostatic, as most bacterial surfaces are anionic, or hydrophobic. Their amino acid composition, amphipathicity, cationic charge and size allow them to attach to and insert into membrane bilayers to form pores by “barrel-stave,” “carpet” or “toroidal-pore” mechanisms. Alternately, they may penetrate into the cell to bind intracellular molecules which are crucial to cell living. Intracellular binding models includes inhibition of cell wall synthesis, alteration of the cytoplasmic membrane, activation of autolysin, inhibition of DNA, RNA, and protein synthesis, and inhibition of certain enzymes. These peptides can be bactericidal and/or bacteriostatic. Typically, the antimicrobial (e.g., antibacterial) activity of these peptides is determined by measuring the minimal inhibitory concentration (MIC).

Antimicrobial peptides have been demonstrated to kill Gram-negative and Gram-positive bacteria, viruses, fungi, and transformed or cancerous cells (Reddy et al. (2004) International Journal of Antimicrobial Agents 24 (6): 536-547). Antimicrobial peptides may also have an immunomodulatory activity. For example, the immunomodulatory activities may be involved in the clearance of infection, e.g., the ability to alter host gene expression, act as chemokines and/or induce chemokine production, inhibiting lipopolysaccharide induced pro-inflammatory cytokine production, promoting wound healing, or modulating the responses of dendritic cells and cells of the adaptive immune response.

Several methods can be used to determine the mechanisms of antimicrobial peptide activity.

These methods include, e.g., solid-state NMR spectroscopy, microscopy, atomic emission spectroscopy, fluorescent dyes, ion channel formation, circular dichroism and orientated circular dichroism, dual polarization interferometry, or neutron and X-ray diffraction.

In an embodiment, the antimicrobial peptide is under 10 kDa, e.g., under 8 kDa, 6 kDa, 4 kDa, 2 kDa, or 1 kDa. In an embodiment, the antimicrobial peptide comprises or consists of from about 6 to about 100 amino acids, e.g., from about 6 to about 75 amino acids, about 6 to about 50 amino acids, about 6 to about 25 amino acids, about 25 to about 100 amino acids, about 50 to about 100 amino acids, or about 75 to about 100 amino acids. In an embodiment, the anti-bacterial peptide comprises or consists of from about 12 to about 50 amino acids. In an embodiment, the anti-bacterial peptide comprises or consists of from about 15 to about 45 amino acids. In an embodiment, the antimicrobial peptide is substantially cationic. In an embodiment, the antimicrobial peptide is substantially amphipathic. In an embodiment, the antimicrobial peptide is substantially cationic and amphipathic. In an embodiment, the antimicrobial peptide is cytostatic to a Gram-negative bacterium. In an embodiment, the antimicrobial peptide is cytotoxic to a Gram-negative bacterium. In an embodiment, the antimicrobial peptide is cytostatic and cytotoxic to a Gram-positive bacterium. In an embodiment, the antimicrobial peptide is broad-spectrum antimicrobial peptide, e.g., cytostatic and/or cytotoxic to two or more bacteria of different genera, species, subspecies, and/or strains. In an embodiment, the antimicrobial peptide is a secreted polypeptide.

Antimicrobial peptides have been isolated and described from a wide range of animals microorganisms, invertebrates, plants, amphibians, birds, fish, and mammals (Wang et al., Nucleic Acids Res. 2009; 37 (Database issue):D933-7). For example, antimicrobial polypeptides are described in Antimicrobial Peptide Database (http://aps.unmc.edu/AP/main.php; Wang et al., Nucleic Acids Res. 2009; 37 (Database issue):D933-7), CAMP: Collection of Anti-Microbial Peptides (http://www.bicnirrh.res.in/antimicrobial/; Thomas et al., Nucleic Acids Res. 2010; 38 (Database issue):D774-80), U.S. Pat. Nos. 5,221,732, 5,447,914, 5,519,115, 5,607,914, 5,714,577, 5,734,015, 5,798,336, 5,821,224, 5,849,490, 5,856,127, 5,905,187, 5,994,308, 5,998,374, 6,107,460, 6,191,254, 6,211,148, 6,300,489, 6,329,504, 6,399,370, 6,476,189, 6,478,825, 6,492,328, 6,514,701, 6,573,361, 6,573,361, 6,576,755, 6,605,698, 6,624,140, 6,638,531, 6,642,203, 6,653,280, 6,696,238, 6,727,066, 6,730,659, 6,743,598, 6,743,769, 6,747,007, 6,790,833, 6,794,490, 6,818,407, 6,835,536, 6,835,713, 6,838,435, 6,872,705, 6,875,907, 6,884,776, 6,887,847, 6,906,035, 6,911,524, 6,936,432, 7,001,924, 7,071,293, 7,078,380, 7,091,185, 7,094,759, 7,166,769, 7,244,710, 7,314,858, and 7,582,301, the contents of which are incorporated by references.

The antimicrobial peptides described herein may inhibit or reduce the viability of one or more bacteria species, e.g., one or more bacteria (e.g., Gram-negative bacteria) of different genera, species, subspecies, and/or strains. In an embodiment, the antimicrobial peptide is capable of inhibiting and/or reducing the viability of 2, 3, 4, 5, 6, 7, 8, 9, 10, or more Gram-negative bacterial strains. For instance, the antibody molecule may inhibit and/or reduce the viability of one or more bacteria of different species, subspecies, and/or strains from Enterobacteriaceae (e.g., Klebsiella, Enterobacter, Shigella, Escherichia, Salmonella, Yersinia, or Citrobacter, e.g., pan-resistant Enterobacteriaceae), one or more bacteria of different species, subspecies, and/or strains from Pseudomonas, one or more bacteria of different species, subspecies, and/or strains from Acinetobacter, or any combination thereof. In an embodiment, the antimicrobial peptide is capable of inhibiting or reducing the viability of Klebsiella pneumonia (e.g., Klebsiella pneumoniae subsp. ozaenae, Klebsiella pneumoniae subsp. pneumoniae, or Klebsiella pneumoniae subsp. rhinoscleromatis), Enterobacter cancerogenous, Enterobacter cloacae, Enterobacter hormaechei, Enterobacter asburiae, Shigella boydii, Shigella dysenteriae, Shigella flexneri, Shigella sonnei, Escherichia coli (e.g., Escherichia coli ATCC 11775, Escherichia coli ATCC 25922, Escherichia coli ATCC 35401, or Escherichia coli ATCC 43895), Escherichia fergusonii, Salmonella choleraesuis, Salmonella choleraesuis subsp. indica, Salmonella enteritidis, Salmonella virchow, Salmonella paratyphi B, Salmonella typhimurium, Salmonella paratyphi A, Salmonella typhi, Salmonella choleraesuis subsp. arizonae, Salmonella choleraesuis subsp. diarizonae, Salmonella choleraesuis subsp. houtenae, Salmonella bongori, Citrobacter sedlakii, Citrobacter braakii, Citrobacter werkmanii, Citrobacter freundii, Citrobacter youngae, Citrobacter amalonaticus, Yersinia enterocolitica, Yersinia frederiksenii, Yersinia pestis, Yersinia pseudotuberculosis, or any combination thereof.

In an embodiment, the antimicrobial peptide is capable of inhibit and/or reduce the viability of one or more: Enterococcus faecium (e.g., vancomycin-resistant (VRE) Enterococcus faecium), Staphylococcus aureus (e.g., methicillin-resistant (MRSA) Staphylococcus aureus), Clostridium difficile, Acinetobacter baumannii (e.g., multidrug resistant (MDR) Acinetobacter), Pseudomonas aeruginosa (e.g., multidrug resistant (MDR) P. aeruginosa, e.g., carbapenem-resistant P. aeruginosa), Enterobacteriaceae (e.g., E. coli, K. pneumoniae, or Enterobacter spp., e.g., carbapenem-resistant Enterobacteriaceae (CRE)), N. gonorrhoaeae (e.g., drug-resistant N. gonorrhoaeae), Salmonella (e.g., drug resistant Salmonella), Shigella (e.g., drug-resistant Shigella), a bacterium producing an extended spectrum β-lactamase (ESBL), or Mycobacterium tuberculosis (e.g., drug-resistant M. tuberculosis). The antimicrobial peptides described herein can have one or more (e.g., two, three or all) of the following properties: strong bacterial inhibition activity, strong bactericidal activity, low red blood cell (RBC) hemolytic activity, or low cytotoxicity (e.g., off-target toxicity). In an embodiment, the antimicrobial peptide has a minimum inhibitory concentration (MIC) of less than 100 μg/ml, e.g., less than 90, 80, 70, 60, 50, 40, 30, 20, 10, or 5 μg/ml, against a bacterial strain described herein, e.g., Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC27853, or both. In an embodiment, the antimicrobial peptide has a minimum bactericidal concentration (MBC) of less than 100 μg/ml, e.g., less than 90, 80, 70, 60, 50, 40, 30, 20, 10, or 5 μg/ml, against a bacterial strain described herein, e.g., Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC27853, or both. In an embodiment, the antimicrobial peptide has low hemolytic activity, e.g., has a PLC to MIC ratio for a Gram-negative bacterium (e.g., a Gram-negative bacterium described herein) which is equal to or greater than 1 (e.g., greater than 4:1, 8:1, 16:1, 24:1, or 32:1), e.g., as determined by a red blood cell hemolysis assay and an MIC assay, respectively. In an embodiment, the PLC is the concentration (e.g., minimum concentration) required or needed to lyse 50% of the red blood cells. In an embodiment, the antimicrobial peptide has low hemolytic activity, e.g., has an MLC to MIC ratio for a Gram-negative bacterium (e.g., a Gram-negative bacterium described herein) which is greater than 4:1 (e.g., greater than 8:1, 16:1, 24:1, or 32:1), e.g., as determined by a red blood cell hemolysis assay and an MIC assay, respectively. In an embodiment, the MLC is the concentration (e.g., minimum concentration) required or needed to lyse 100% of the red blood cells.

In an embodiment, the antimicrobial peptide is an α-helical peptide. In an embodiment, the antimicrobial peptide has two or more amino acid residues cross-linked. For example, two cysteine residues in the antimicrobial peptide can be cross-linked, e.g., chemically cross-linked. While not wishing to be bound by theory, it is believed that in an embodiment, cross-linking two or more amino acid residues in an antimicrobial peptide may enhance α-helical conformation, enhance serum stability, and/or increase antimicrobial potency. In an embodiment, the antimicrobial peptide having two or more amino acid residues cross-linked is at least 2, 3, 4, 5, 6, 7, 8, 9, or 10-fold more stable, e.g., in serum, than an otherwise identical antimicrobial peptide that does not have two or more amino acid residues cross-linked. In an embodiment, the antimicrobial peptide having two or more amino acid residues cross-linked has a MIC that is at least 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%, 98%, or 99% lower than an otherwise identical antimicrobial peptide that does not have two or more amino acid residues cross-linked.

In an embodiment, the antimicrobial peptide is coupled (e.g., fused) to an antibody molecule, e.g., an antibody molecule described herein, e.g., to form an antibody molecule-drug conjugate (ADC).

The following criteria can be used to select a candidate antimicrobial peptide: broad spectrum (e.g., activity against multiple bacterial pathogens), alpha-helical secondary structure (e.g., readily expressed in functional form), mechanism of action by membrane disruption (e.g., bactericidal and/or synergy with small molecules), in vivo stability (e.g., stable in human sera), and adaptable to N-terminal modifications (e.g., to function as C-terminal antibody conjugates).

The antimicrobial peptides described herein can contain a sequence that does not have an antimicrobial activity by itself. In an embodiment, the antimicrobial peptide comprises a linker sequence. In an embodiment, the antimicrobial peptide comprises a sortase donor sequence.

In an embodiment, the antimicrobial peptide alone does not bind to LPS, e.g., a core region of LPS.

In an embodiment, a heavy chain of the antibody molecule comprises a first sortase acceptor sequence and a light chain of the antibody molecule comprises a second sortase acceptor sequence. In an embodiment, the sortase acceptor sequence, e.g., the first sortase recognition sequence, comprises the amino acid sequence of (GS)₆LPETGGG (SEQ ID NO: 24). In another embodiment, the sortase acceptor sequence, e.g., the second sortase acceptor sequence, comprises the amino acid sequence of P(G₄S)₂LPETGGSG (SEQ ID NO: 26).

In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, or 5 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 96%, 97%, 98%, 99%, or 100% homology with, an amino acid sequence described herein, e.g., any of SEQ ID NOS: 67-80, 94-102, 147-156, 158-159, or 163-164. In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence described herein e.g., any of SEQ ID NOS: 67-80, 94-102, 147-156, 158-159, or 163-164, or a portion thereof, e.g., a functional fragment thereof (e.g., one or more (e.g., two, three, four or more) of the N-terminal G residues are omitted). For example, the first three N-terminal G residues in any of SEQ ID NOS: 101, 147, 152-154, 156, or 163-164 can be omitted. In an embodiment, the presence of one or more (e.g., two, three, four or more) of the N-terminal G residues does not reduce, or significantly reduce, the activity of the antimicrobial peptide.

In an embodiment, the peptide comprises the amino acid sequence of:

(SEQ ID NO: 68) RGLRRLGRKIAHGVKKYGPTVLRIIRIAG, (SEQ ID NO: 80) GGGRGLRRLGRKIAHGVKKYGPTVLRIIRIAG, (SEQ ID NO: 101) GGGGRFKRFRKKFKKLFKKLSPVIPLLHLG, or (SEQ ID NO: 102) GRFKRFRKKFKKLFKKLSPVIPLLHLG.

In an embodiment, the antimicrobial peptide is a stapled antimicrobial peptide. Without wishing to be bound by theory, it is believed that in an embodiment, stapling can increase stability, reduce non-specific binding, or both, e.g., in serum. Exemplary stapling methods are described, e.g., in Alexander et al. J. Am. Chem. Soc., 2013, 135 (16), 5946-5949; and Example 7.

In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence described in Tables 3 or 6A-6B or in FIG. 4 or 15A-15B. In another embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence described in Tables 3 or 6A-6B or in FIG. 4 or 15A-15B, or a portion thereof, e.g., a functional fragment thereof. In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NOS: 67-80, 94-102, 147-156, 158-159, or 163-164. In an embodiment, the antimicrobial peptide comprises a carboxamide group (e.g., a C-terminal carboxamide functional group).

In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 101.

In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 147.

In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 152.

In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 153.

In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 154.

In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 156.

In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 163.

In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 164.

In an embodiment, the antimicrobial peptide comprises one or more (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38. 39, 40, or more) D-amino acids. In an embodiment, at least 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, or 100% of the amino acid residues in the antimicrobial peptide are D-amino acids. In an embodiment, all of the amino acid residues in the antimicrobial peptide are D-amino acids. Without wishing to be bound by theory, it is believed that in an embodiment, the presence of one or more (e.g., all) D-amino acids in the antimicrobial peptide can increase the stability of the antimicrobial peptide or ADC, e.g., in serum (e.g., human serum), e.g., compared to an otherwise identical antimicrobial peptide that contains one or more (e.g., all) L-amino acids.

In an embodiment, the antimicrobial peptide comprises one or more (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38. 39, 40, or more) L-amino acids. In an embodiment, at least 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, or 100% of the amino acid residues in the antimicrobial peptide are L-amino acids. In an embodiment, all of the amino acid residues in the antimicrobial peptide are L-amino acids.

In an embodiment, the antimicrobial peptide comprises one or more D-amino acids and one or more L-amino acids. For example, any of the amino acid residues in the antimicrobial peptides described in Tables 3 or 6A-6B or in FIG. 4 or 15A-15B can be a D-amino acid or an L-amino acid.

TABLE 3 Amino acid sequences of exemplary antimicrobial peptides SEQ ID Peptide Amino Acid Sequences NO Peptide 26 ALWKTLLKKVLKAAAK  67 Peptide 119 RGLRRLGRKIAHGVKKYGPTVLRIIRIAG  68 Peptide 109 GIGKFLKKAKKFGKAFVKILKK  69 Peptide 30 ALWKTLLKKVLKAAAKGGGGSGGGGS  70 Peptide 24 GIGKFLKKAKKFGKAFVKILKKGGGGSGGGGS  71 Peptide 126 KKLLKWLKKLL  72 Peptide 21 (MAL)-(EG3)-GIGKFLKKAKKFGKAFVKILKK  73 Peptide 128 RLGNFFRKAKKKIGRGLKKIGQKIKDFLGNLVPRTES  74 Peptide 23 GGGGSGGGGSGIGKFLKKAKKFGKAFVKILKK  75 Peptide 33 GLRKRLRKFRNKIKEKLKKIGQKIQGLLPKLA  76 Peptide 29 GGGGSGGGGSALWKTLLKKVLKAAAK  77 Peptide 85 GWKKWFNRAKKVGKTVGGLAVDHYLG  78 Peptide 70 GAFGNFLKGVAKKAGLKILSIAQCKLFGTC  79 GGGRGLRRLGRKIAHGVKKYGPTVLRIIRIAG  80 GIGKHVGKALKGLKGLLKGLGES  94 GRRKRKWLRRIGKGVKIIGGAALDHL  95 GGLRSLGRKILRAWKKYGPQATPATRQ  96 IKWKKLLRAAKRIL  97 IGKKWKRIVKRIKKFLRKL  98 ILGKIWKIKKLF  99 RLGDILQKAREKIEGGLKKLVQKIKDFFGKFAPRTES 100 GGGGRFKRFRKKFKKLFKKLSPVIPLLHLG 101 GRFKRFRKKFKKLFKKLSPVIPLLHLG 102 Peptide 265 GGGLLGDFFRKSKEKIGKEFKRIVQRIKDFLRNLVPRTES 147 Peptide 266 GGGKWKSFIKKLTKAAKKVVTTAKKPLIV 148 Peptide 267 GGGGRFKRFRKKFKKLFKKLSPVIPLLHLG 101 Peptide 268 GGGVNWKKILGKIIKVVK 149 Peptide 269 GGGTLISWIKNKRKQRPRVSRRRRRRGGRRRR 150 Peptide 270 GGGGIGAILKVLATGLPTLISWIKNKRKQ 151 Peptide 271 GGGGLRKRLRKFRNKIKEKLKKIGQKIQGLLPKLA 152 Peptide 293 GGGGLRRLGRKIAHGIKKYGPTILRIIRIAG 153 Peptide 294 GGGRGLRRLGRKIAHGVKKYGPTVLRIIKKYG 154 Peptide 295 GGGGRFKRFRKKFKKLFKKLSPVIPLLHLG 101 Peptide 296 GGGKRFKKFFKKLKNSVKKRAKKFFKKPRVIGVSIPF 155 Peptide 297 GGGKFFRKLKKSVKKRAKEFFKKPRVIGVSIPF 156 Peptide 261 GGGGIGKFLKKAKKFGKAFVKILKK 163 GGG-Octapeptin GGG-D-Dab-cyclic(L-Dab-L-Dab-D-Leu-L-Phe-L- 164 Dab-L-Dab-L-Leu) MAL: maleimide; EG3: tri(ethylene glycol)

In an embodiment, the ADC comprises a peptide comprising the amino acid sequence of

(SEQ ID NO: 68) RGLRRLGRKIAHGVKKYGPTVLRIIRIAG, (SEQ ID NO: 80) GGGRGLRRLGRKIAHGVKKYGPTVLRIIRIAG, (SEQ ID NO: 101) GGGGRFKRFRKKFKKLFKKLSPVIPLLHLG, or (SEQ ID NO: 102) GRFKRFRKKFKKLFKKLSPVIPLLHLG.

In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence selected from: RGLRRLGRKIAHGVKKYGPTVLRIIRIAG (SEQ ID NO: 68), GIGKFLKKAKKFGKAFVKILKK (SEQ ID NO: 69), KKLLKWLKKLL (SEQ ID NO: 72), RLGNFFRKAKKKIGRGLKKIGQKIKDFLGNLVPRTES (SEQ ID NO: 74), GIGKHVGKALKGLKGLLKGLGES (SEQ ID NO: 94), GRRKRKWLRRIGKGVKIIGGAALDHL (SEQ ID NO: 95), GGLRSLGRKILRAWKKYGPQATPATRQ (SEQ ID NO: 96), IKWKKLLRAAKRIL (SEQ ID NO: 97), IGKKWKRIVKRIKKFLRKL (SEQ ID NO: 98), ILGKIWKIKKLF (SEQ ID NO: 99), or RLGDILQKAREKIEGGLKKLVQKIKDFFGKFAPRTES (SEQ ID NO: 100).

Antibody Molecule-Drug Conjugates

As used herein, the term “antibody molecule-drug conjugate” or ADC refers to an antibody molecule that is coupled to a non-antibody moiety, e.g., a therapeutic agent or label, e.g., an antimicrobial peptide. The antibody molecule can be coupled to the non-antibody moiety directly, or indirectly, e.g., through a linker.

In an embodiment, the antibody molecule is coupled to the non-antibody moiety by a covalent bond. In an embodiment, the antibody molecule is coupled to the non-antibody moiety by a peptide bond. In an embodiment, the coupling of the antibody molecule to the non-antibody moiety is mediated by a sortase. In an embodiment, the coupling of the antibody molecule and the non-antibody moiety forms a fusion protein. In an embodiment, the antibody molecule and the non-antibody moiety forms a fusion protein. In an embodiment, the fusion protein comprises a linker between the antibody molecule (e.g., a heavy chain, a light chain, or both) and the non-antibody moiety. In an embodiment, the antibody molecule is coupled to the non-antibody moiety by a non-peptide bond. In an embodiment, the antibody molecule is not coupled to the non-antibody moiety by a non-peptide bond. In an embodiment, a non-antibody moiety is also referred to as a “payload.”

In an embodiment, the non-antibody moiety is coupled to the backbone of the antibody molecule. In another embodiment, the non-antibody moiety is coupled to a side chain of the antibody molecule. In an embodiment, the non-antibody moiety is a peptide (e.g., an antimicrobial peptide) and the antibody molecule is coupled to the backbone of the peptide (e.g., antimicrobial peptide). In an embodiment, the non-antibody moiety is a peptide (e.g., an antimicrobial peptide) and the antibody molecule is coupled to a side-chain of the peptide (e.g., antimicrobial peptide).

In an embodiment, two or more (e.g., three, four, five, six, seven, eight, or more) non-antibody moieties (e.g., antimicrobial peptides) are coupled to the antibody molecule. In an embodiment, four non-antibody moieties (e.g., antimicrobial peptides) are coupled to the antibody molecule. For example, the non-antibody moieties can be the same, or at least some of the non-antibody moieties are different from each other. In an embodiment, the non-antibody moiety (e.g., antimicrobial peptide) is coupled to the antibody molecule in a bivalent manner In another embodiment, the non-antibody moiety (e.g., antimicrobial peptide) is coupled to the antibody molecule in a tetravalent manner.

In an embodiment, the ADC comprises an antibody molecule that binds to a bacterium (e.g., a Gram-negative bacterium). In an embodiment, the ADC comprises an antibody molecule that binds to LPS, e.g., on the outer membrane of a Gram-negative bacterium). In an embodiment, the ADC comprises an antibody molecule described herein.

In an embodiment, the ADC comprises one, two, or three CDRs of the VH region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001), using the Kabat or Chothia definitions of CDRs. In an embodiment, the ADC comprises one, two, or three CDRs of the VL region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001), using the Kabat or Chothia definitions of CDRs. In an embodiment, the ADC comprises one or more (e.g., two or three) CDRs of the VH region and/or one or more (e.g., two or three) CDRs of the VL region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001), using the Kabat or Chothia definitions of CDRs.

In an embodiment, the ADC comprises one, two, or three VH CDRs described in Table 1 or 8. In an embodiment, the ADC comprises one, two, or three VL CDRs described in Table 1 or 8. In an embodiment, the ADC comprises one or more (e.g., two or three) VH CDRs and/or one or more (e.g., two or three) VL CDRs described in Table 1 or 8.

In an embodiment, the ADC comprises one, two, three, or four frameworks of the VH region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001). In an embodiment, the ADC comprises one, two, three, or four frameworks of the VL region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001). In an embodiment, the ADC comprises one or more (e.g., two, three, or four) frameworks of the VH region and/or one or more (e.g., two, three, or four) frameworks of the VL region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001).

In an embodiment, the ADC comprises a heavy chain variable region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001). In an embodiment, the ADC comprises a light chain variable region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001). In an embodiment, the ADC comprises a heavy chain variable region and a light chain variable region of an antibody molecule described in Table 1 or 8 (e.g., mAb001, A001-25, hWN01, hWNv1, 3E7, 3G1, 2C7, or 3D6, or any of the humanized mAb001).

In an embodiment, the ADC comprises a heavy chain variable region having an amino acid sequence described in Table 1 or 8. In an embodiment, the ADC comprises a light chain variable region having an amino acid sequence described in Table 1 or 8. In an embodiment, the ADC comprises a heavy chain variable region having an amino acid sequence described in Table 2 and a light chain variable region having an amino acid sequence described in Table 1 or 8.

In an embodiment, the antibody molecule comprises a heavy chain variable region encoded by a nucleotide sequence described in Table 2. In an embodiment, the antibody molecule comprises a light chain variable region encoded by a nucleotide sequence described in Table 2. In an embodiment, the antibody molecule comprises a heavy chain variable region encoded by a nucleotide sequence described in Table 2 and a light chain variable region encoded by a nucleotide sequence described in Table 2.

In an embodiment, the ADC comprises a heavy chain constant region. In an embodiment, the ADC comprises a light chain constant region. In an embodiment, the ADC comprises a heavy chain constant region and a light chain constant region. In an embodiment, the ADC comprises a heavy chain constant region, a light chain constant region, and heavy and light chain variable regions of an antibody molecule described in Table 1 or 8. In certain embodiments, the ADC comprises a heavy chain constant region, a light chain constant region, and variable regions that comprise one, two, three, four, five, or six CDRs of antibody molecule described in Table 1 or 8.

In an embodiment, the ADC is capable of binding to two or more Gram-negative bacteria of different genera, species, subspecies, and/or strains. Antibody molecules or ADCs capable of binding to two or more Gram-negative bacteria of different genera, species, subspecies, and/or strains have several advantageous properties. For example, one therapy can be used to treat, prevent, or diagnose multiple bacterial infections. In addition, a physician need not determine which bacterial genus, species, subspecies and/or strain infected a patient in order to determine the appropriate therapy. Accordingly, in an embodiment, the ADC is capable of independently binding to 2, 3, 4, 5, 6, 7, 8, 9, 10, or more Gram-negative bacteria of different genera, species, subspecies, and/or strains, with high affinity. For instance, the antibody molecule may independently bind with high affinity to one or more bacteria of different species, subspecies, and/or strains from Enterobacteriaceae (e.g., Klebsiella, Enterobacter, Shigella, Escherichia, Salmonella, Yersinia, or Citrobacter, e.g., pan-resistant Enterobacteriaceae), one or more bacteria of different species, subspecies, and/or strains from Pseudomonas, one or more bacteria of different species, subspecies, and/or strains from Acinetobacter, or any combination thereof. In an embodiment, the ADC is capable of binding to Klebsiella pneumonia (e.g., Klebsiella pneumoniae subsp. ozaenae, Klebsiella pneumoniae subsp. pneumoniae, or Klebsiella pneumoniae subsp. rhinoscleromatis), Enterobacter cancerogenous, Enterobacter cloacae, Enterobacter hormaechei, Enterobacter asburiae, Shigella boydii, Shigella dysenteriae, Shigella flexneri, Shigella sonnei, Escherichia coli (e.g., Escherichia coli ATCC 11775, Escherichia coli ATCC 25922, Escherichia coli ATCC 35401, or Escherichia coli ATCC 43895), Escherichia fergusonii, Salmonella choleraesuis, Salmonella choleraesuis subsp. indica, Salmonella enteritidis, Salmonella virchow, Salmonella paratyphi B, Salmonella typhimurium, Salmonella paratyphi A, Salmonella typhi, Salmonella choleraesuis subsp. arizonae, Salmonella choleraesuis subsp. diarizonae, Salmonella choleraesuis subsp. houtenae, Salmonella bongori, Citrobacter sedlakii, Citrobacter braakii, Citrobacter werkmanii, Citrobacter freundii, Citrobacter youngae, Citrobacter amalonaticus, Yersinia enterocolitica, Yersinia frederiksenii, Yersinia pestis, Yersinia pseudotuberculosis, or any combination thereof.

In an embodiment, the ADC is capable of binding to one or more of: Enterococcus faecium (e.g., vancomycin-resistant (VRE) Enterococcus faecium), Staphylococcus aureus (e.g., methicillin-resistant (MRSA) Staphylococcus aureus), Clostridium difficile, Acinetobacter baumannii (e.g., multidrug resistant (MDR) Acinetobacter), Pseudomonas aeruginosa (e.g., multidrug resistant (MDR) P. aeruginosa, e.g., carbapenem-resistant P. aeruginosa), Enterobacteriaceae (e.g., E. coli, K. pneumoniae, or Enterobacter spp., e.g., carbapenem-resistant Enterobacteriaceae (CRE)), N. gonorrhoaeae (e.g., drug-resistant N. gonorrhoaeae), Salmonella (e.g., drug resistant Salmonella), Shigella (e.g., drug-resistant Shigella), a bacterium producing an extended spectrum β-lactamase (ESBL), or Mycobacterium tuberculosis (e.g., drug-resistant M. tuberculosis).

In an embodiment, the ADC is capable of binding to one or more (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, or all) P. aeruginosa strains in Table 7. In another embodiment, the ADC is capable of binding to one or more (e.g., 2, 3, 4, 5, 6, or all) multidrug-resistant P. aeruginosa strains in Table 7.

In an embodiment, the ADC binds to a linear or conformational epitope on LPS. In another embodiment, the ADC binds to a core pentasaccharide region on LPS. In an embodiment, the ADC has an opsonophagocytic activity, e.g., as determined by an opsonophagocytosis assay described herein.

In an embodiment, the ADC comprises an antimicrobial peptide, e.g., an antimicrobial peptide described herein, e.g., having an amino acid sequence disclosed in Tables 3 or 6A-6B or in FIG. 4 or 15A-15B. In another embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence described in Tables 3 or 6A-6B or in FIG. 4 or 15A-15B, or a portion thereof, e.g., a functional fragment thereof (e.g., one or more (e.g., two, three, four or more) of the N-terminal G residues are omitted). In an embodiment, the antimicrobial peptide comprises or consists of an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of any of SEQ ID NO: 67-80, 94-102, 147-156, 158-159, or 163-164. In an embodiment, the ADC comprises one or more (e.g., two, three, four, five, six, seven, eight, or more) antimicrobial peptides, each of which has an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of any of SEQ ID NO: 67-80, 94-102, 147-156, 158-159, or 163-164. In an embodiment, the ADC comprises four or more antimicrobial peptides, each of which has an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of any of SEQ ID NO: 67-80, 94-102, 147-156, 158-159, or 163-164. In an embodiment, the ADC comprises four or more antimicrobial peptides, each of which comprises or consists of the amino acid sequence of any of SEQ ID NO: 67-80, 94-102, 147-156, 158-159, or 163-164. In an embodiment, the antimicrobial peptide comprises a carboxamide group (e.g., a C-terminal carboxamide functional group).

In an embodiment, the antimicrobial peptide comprises one or more (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38. 39, 40, or more) D-amino acids. In an embodiment, at least 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, or 100% of the amino acid residues in the antimicrobial peptide are D-amino acids. In an embodiment, all of the amino acid residues in the antimicrobial peptide are D-amino acids.

In an embodiment, the antimicrobial peptide comprises one or more (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38. 39, 40, or more) L-amino acids. In an embodiment, at least 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, or 100% of the amino acid residues in the antimicrobial peptide are L-amino acids. In an embodiment, all of the amino acid residues in the antimicrobial peptide are L-amino acids.

In an embodiment, the antimicrobial peptide comprises one or more D-amino acids and one or more L-amino acids.

In an embodiment, the ADC is capable of inhibiting and/or reducing the viability of 2, 3, 4, 5, 6, 7, 8, 9, 10, or more bacteria (e.g., Gram-negative bacteria) of different genera, species, subspecies, and/or strains. For instance, the antibody molecule may inhibit and/or reduce the viability of one or more bacteria of different species, subspecies, and/or strains from Enterobacteriaceae (e.g., Klebsiella, Enterobacter, Shigella, Escherichia, Salmonella, Yersinia, or Citrobacter, e.g., pan-resistant Enterobacteriaceae), one or more bacteria of different species, subspecies, and/or strains from Pseudomonas, one or more bacteria of different species, subspecies, and/or strains from Acinetobacter, or any combination thereof. In an embodiment, the ADC is capable of inhibiting or reducing the viability of Klebsiella pneumonia (e.g., Klebsiella pneumoniae subsp. ozaenae, Klebsiella pneumoniae subsp. pneumoniae, or Klebsiella pneumoniae subsp. rhinoscleromatis), Enterobacter cancerogenous, Enterobacter cloacae, Enterobacter hormaechei, Enterobacter asburiae, Shigella boydii, Shigella dysenteriae, Shigella flexneri, Shigella sonnei, Escherichia coli (e.g., Escherichia coli ATCC 11775, Escherichia coli ATCC 25922, Escherichia coli ATCC 35401, or Escherichia coli ATCC 43895), Escherichia fergusonii, Salmonella choleraesuis, Salmonella choleraesuis subsp. indica, Salmonella enteritidis, Salmonella virchow, Salmonella paratyphi B, Salmonella typhimurium, Salmonella paratyphi A, Salmonella typhi, Salmonella choleraesuis subsp. arizonae, Salmonella choleraesuis subsp. diarizonae, Salmonella choleraesuis subsp. houtenae, Salmonella bongori, Citrobacter sedlakii, Citrobacter braakii, Citrobacter werkmanii, Citrobacter freundii, Citrobacter youngae, Citrobacter amalonaticus, Yersinia enterocolitica, Yersinia frederiksenii, Yersinia pestis, Yersinia pseudotuberculosis, or any combination thereof.

In an embodiment, the ADC is capable of inhibiting or reducing the viability of one or more of: Enterococcus faecium (e.g., vancomycin-resistant (VRE) Enterococcus faecium), Staphylococcus aureus (e.g., methicillin-resistant (MRSA) Staphylococcus aureus), Clostridium difficile, Acinetobacter baumannii (e.g., multidrug resistant (MDR) Acinetobacter), Pseudomonas aeruginosa (e.g., multidrug resistant (MDR) P. aeruginosa, e.g., carbapenem-resistant P. aeruginosa), Enterobacteriaceae (e.g., E. coli, K. pneumoniae, or Enterobacter spp., e.g., carbapenem-resistant Enterobacteriaceae (CRE)), N. gonorrhoaeae (e.g., drug-resistant N. gonorrhoaeae), Salmonella (e.g., drug resistant Salmonella), Shigella (e.g., drug-resistant Shigella), a bacterium producing an extended spectrum β-lactamase (ESBL), or Mycobacterium tuberculosis (e.g., drug-resistant M. tuberculosis).

In an embodiment, the ADC is capable of binding to one or more (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, or all) P. aeruginosa strains in Table 7. In another embodiment, the ADC is capable of binding to one or more (e.g., 2, 3, 4, 5, 6, or all) multidrug-resistant P. aeruginosa strains in Table 7.

While not wishing to be bound by theory, the antimicrobial peptides suitable for the ADCs described herein can be selected, at least in part, based on one or more (e.g., two, three or all) of the following properties: strong bacterial inhibition activity, strong bactericidal activity, low red blood cell (RBC) hemolytic activity, or low cytotoxicity (e.g., off-target toxicity). In an embodiment, the antimicrobial peptide has a minimum inhibitory concentration (MIC) of less than 100 μg/ml, e.g., less than 90, 80, 70, 60, 50, 40, 30, 20, 10, or 5 μg/ml, against a bacterial strain described herein, e.g., Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC27853, or both. In an embodiment, the antimicrobial peptide has a minimum bactericidal concentration (MBC) of less than 100 μg/ml, e.g., less than 90, 80, 70, 60, 50, 40, 30, 20, 10, or 5 μg/ml, against a bacterial strain described herein, e.g., Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC27853, or both. In an embodiment, the antimicrobial peptide has low hemolytic activity, e.g., has a PLC to MIC ratio for a Gram-negative bacterium (e.g., a Gram-negative bacterium described herein) which is equal to or greater than 1 (e.g., greater than 4:1, 8:1, 16:1, 24:1, or 32:1), e.g., as determined by a red blood cell hemolysis assay and an MIC assay, respectively. In an embodiment, the PLC is the concentration (e.g., minimum concentration) required or needed to lyse 50% of the red blood cells. In an embodiment, the antimicrobial peptide has low hemolytic activity, e.g., has an MLC to MIC ratio for a Gram-negative bacterium (e.g., a Gram-negative bacterium described herein) which is greater than 4:1 (e.g., greater than 8:1, 16:1, 24:1, or 32:1), e.g., as determined by a red blood cell hemolysis assay and an MIC assay, respectively. In an embodiment, the MLC is the concentration (e.g., minimum concentration) required or needed to lyse 100% of the red blood cells.

In an embodiment, the antimicrobial peptide is an α-helical peptide. In an embodiment, the antimicrobial peptide has two or more amino acid residues cross-linked. For example, two cysteine residues in the antimicrobial peptide can be cross-linked, e.g., chemically cross-linked. While not wishing to be bound by theory, it is believed that in an embodiment, cross-linking two or more amino acid residues in an antimicrobial peptide may enhance α-helical conformation, enhance serum stability, and/or increase antimicrobial potency. In an embodiment, the antimicrobial peptide having two or more amino acid residues cross-linked is at least 2, 3, 4, 5, 6, 7, 8, 9, or 10-fold more stable, e.g., in serum, than an otherwise identical antimicrobial peptide that does not have two or more amino acid residues cross-linked. In an embodiment, the antimicrobial peptide having two or more amino acid residues cross-linked has a MIC that is at least 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%, 98%, or 99% lower than an otherwise identical antimicrobial peptide that does not have two or more amino acid residues cross-linked.

In an embodiment, the ADC is produced by enzymatic synthesis. For example, ADCs can be produced by expression of an antibody molecule (e.g., a tagged antibody molecule), chemical synthesis of a peptide (e.g., an antimicrobial peptide), and enzymatic ligation of the peptide to the antibody molecule. In an embodiment, 90% or more, e.g., 92% or more, 95% or more, 97% or more, or 99% or more, reaction efficiency is achieved. In another embodiment, the method further comprises purifying the ADC. In an embodiment, the yield is 60% or more (e.g., 70% or more, 75% or more, 80% or more, 90% or more, or 95% or more) after purification.

In an embodiment, the ADC binds to a bacterial surface. In another embodiment, the ADC binds to a secreted vesicle. In yet another embodiment, the ADC binds to both a bacterial surface and a secreted vesicle. In an embodiment, the binding is detected by electron microscopy. In an embodiment, the ADC has enhanced binding to bacteria from a first genus, species, or subspecies, compared to binding to bacteria from a second genus, species, or subspecies. In an embodiment, the ADC has enhanced binding to P. aeruginosa, compared to binding to bacteria other than P. aeruginosa (e.g., E. coli or Klebsiella spp.).

In an embodiment, the ADC comprising: a) an antibody molecule that binds to lipopolysaccharide (LPS); and b) an antimicrobial peptide,

wherein the antibody molecule comprises a VH and a VL, wherein the VH comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the VL comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), and wherein the ADC or antibody molecule comprises:

(a) an HCDR1 comprising the amino acid sequence of SEQ ID NO: 108; an HCDR2 comprising the amino acid sequence of any of SEQ ID NOS: 109, 145, or 146; an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107; an LCDR1 comprising the amino acid sequence of any of SEQ ID NOS: 110, 138, 140, or 144; an LCDR2 comprising the amino acid sequence of any of SEQ ID NOS: 111, 139, 141, 142, or 143; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO: 112, or

(b) an HCDR1 comprising the amino acid sequence of SEQ ID NO: 105; an HCDR2 comprising the amino acid sequence of SEQ ID NO: 106; an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107; an LCDR1 comprising the amino acid sequence of any of SEQ ID NOS: 110, 138, 140, or 144; an LCDR2 comprising the amino acid sequence of any of SEQ ID NOS: 111, 139, 141, 142, or 143; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO: 112; and

wherein the antimicrobial peptide comprises or consists of:

(i) an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 101;

(ii) an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 147;

(iii) an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 152;

(iv) an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 153;

(v) an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 154;

(vi) an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 156;

(vii) an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 163; or

(viii) an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid residues from, or has at least 80%, 85%, 90%, 95%, 97%, or 100% homology with, the amino acid sequence of SEQ ID NO: 164.

In an embodiment, the ADC comprises (a) and (i). In an embodiment, the ADC comprises (a) and (ii). In an embodiment, the ADC comprises (a) and (iii). In an embodiment, the ADC comprises (a) and (iv). In an embodiment, the ADC comprises (a) and (v). In an embodiment, the ADC comprises (a) and (vi). In an embodiment, the ADC comprises (a) and (vii). In an embodiment, the ADC comprises (a) and (viii). In an embodiment, the ADC comprises (b) and (i). In an embodiment, the ADC comprises (b) and (ii). In an embodiment, the ADC comprises (b) and (iii). In an embodiment, the ADC comprises (b) and (iv). In an embodiment, the ADC comprises (b) and (v). In an embodiment, the ADC comprises (b) and (vi). In an embodiment, the ADC comprises (b) and (vii). In an embodiment, the ADC comprises (b) and (viii).

Evaluation of Candidates: Opsonophagocytosis Assay (OPA)

The candidates of antibody molecules and antibody molecule-drug conjugates (ADCs) described herein can be evaluated, e.g., in vitro, for their opsonophagocytic activities, by opsonophagocytosis assays.

Assays for antibody-mediated, complement-dependent opsonization are described, e.g., in Hemachandra et al. Infect Immun. 2001; 69(4):2223-2229. Briefly, the ability of the antibody molecule or ADC candidates to opsonize bacteria for uptake by human polymorphonuclear leukocytes (PMNs) can be measured by flow cytometry. Bacteria are grown, heat killed, and FITC labeled. Opsonization can be carried out by incubating the labeled bacteria with antibody molecules or antibody molecule-drug conjugates with or without 1% human serum from an agammaglobulinemic patient as the complement source. Bacteria are washed in PBS containing 6% dextran and 0.2% glucose and then are resuspended in Hanks balanced salt solution with 0.1% gelatin. PMNs can be isolated from peripheral human blood via venipuncture of healthy adult volunteers. PMNs are resuspended to achieve a concentration of 10⁷ cells/ml and are activated for 30 min with 10 μl of a 10⁻⁶ dilution of N-formyl-Met-Leu-Phe (FMLP; Peninsula Laboratories, San Carlos, Calif.) per ml of cells. PMNs are added to each opsonized bacterial opsonized bacterial sample, incubated at 37° C., separated from free bacteria by differential centrifugation, and resuspended in PBS. Single-color flow cytometric analysis of PMN can be performed utilizing a FACScan and CellQuest software (Becton Dickinson, Mountain View, Calif.), and phagocytosis is expressed in relative units of mean fluorescence of 10,000 PMN for each sample. To demonstrate that the observed opsonophagocytosis is associated with bacterial killing, an alternative assay can be used in which 25,000 CFU of live bacteria are mixed with agammaglobulinemic human serum, various concentrations of antibody molecules or antibody molecule-drug conjugates, and 10⁶ fresh human PMN obtained as described above in RPMI medium (400-ml final volume). Samples are obtained at the beginning and end of a 90-min 37° C. incubation, after which bacteria are diluted and then plated for bacterial enumeration.

An exemplary opsonophagocytosis assay is also described in Example 1.

Evaluation of Candidates: Minimal Inhibitory Concentration Determination

The candidates of antimicrobial peptides and antibody molecule-drug conjugates (ADCs) described herein can be evaluated, e.g., in vitro, for their microbial inhibitory activities, by determining the minimal inhibitory concentration (MIC).

In an embodiment, the MIC is determined in the presence of human serum (e.g., 50% human serum), and sometimes referred to herein as hsMIC. In an embodiment, the MIC is determined in the presence of phosphate-buffered saline (PBS). In an embodiment, the MIC or hsMIC is determined on per ADC basis. In an embodiment, the MIC or hsMIC is determined on per payload or antimicrobial peptide basis. In an embodiment, the ratio of hsMIC to MIC is equal to or less than 2, e.g., equal to or less than 1.5 or 1.

Methods for determining MIC are also described, e.g., in Clinical and Laboratory Standards Institute. 2012. Methods for dilution antimicrobial susceptibility tests for bacteria that grow aerobically; approved standard, 9th ed. M07-A8, vol 29, no. 2 Clinical and Laboratory Standards Institute, Wayne, Pa. For example, MIC can be determined according to CLSI guidelines, using 2-fold serial compound dilutions, in 96-well microtiter plates. Briefly, compounds are diluted in water across a mother plate then 2 μl is stamped to assay plates, one plate for each strain to be tested. Bacterial strains are sub-cultured overnight on agar plates at 37° C. Overnight plates are used to prepare 0.5 McFarland cultures in 0.85% saline. These concentrated cultures are diluted 1:200 in growth media to approximately 5×10⁵ cells/ml. All assay plates receive 100 μl diluted culture per well. All plates are placed at 37° C. overnight. After 18 hours the plates are read using a mirrored plate reader and reflected incandescent light. In some embodiments, the MIC can be defined as the lowest concentration of compound that inhibits growth by at least 80%. Wells at and above the MIC should appear void of growth when read by eye.

An exemplary method for determination of MIC is also described in Example 2.

Animal Models

The antibody molecules, antibody molecule-drug conjugates (ADCs), and antimicrobial peptides described herein can be evaluated in vivo, e.g., using various animal models. For example, an animal model can be used to test the efficacy of an antibody molecule, anti-bacterial peptide, or antibody molecule-drug conjugate described herein in reducing or inhibiting bacterial infection Animal models can also be used, e.g., to investigate for side effects, measure concentrations of antibody molecules, anti-bacterial peptides or antibody molecule-drug conjugates in situ, demonstrate correlations between bacterial infection and bacteria under controlled conditions.

Exemplary animal models that can be used for evaluating an antibody molecule, anti-bacterial peptide, or antibody molecule-drug conjugate described herein include, but are not limited to, basic antimicrobial screening models (e.g., as described in Zak and O'Reilly, Antimicrob. Agents Chemother. 1991; 35(8): 1527-1531); primary rodent infection models (e.g., as described in Marra and Girard Curr. Protoc. Pharmacol. 2006; Chapter 13: Unit 13A.4); ex vivo models (e.g., as described in Zak and O'Reilly, Antimicrob. Agents Chemother. 1991; 35(8): 1527-1531); monoparametric or discriminative models (e.g., as described in Zak and O'Reilly, Antimicrob. Agents Chemother. 1991; 35(8): 1527-1531); mice models for wound healing (e.g., as described in Samy et al. Methods Mol. Biol. 2011; 716: 245-265); rabbit models for evaluation of bacterial migration and colonization (e.g., as described in Allan et al. J. Biomed. Biotechnol. 2012; 2012: 921617). Pharmacokinetic-pharmacodynamic modeling of antimicrobial drugs are described, e.g., in Nielsen and Friberg Pharmacol. Rev. 2013; 65(3):1053-1090.

Exemplary types of animals that can be used to evaluate antibody molecules, anti-bacterial peptides, or antibody molecule-drug conjugates described herein include, but are not limited to, mice, rats, rabbits, guinea pigs, and monkeys. Various methods of immunosuppression can be used for enhancement of virulence of bacteria for inoculation. These methods include, e.g., targeting bone marrow (e.g., by irradiation), targeting neutrophils (e.g., using cytostatics), targeting macrophages (e.g., using mucin or baker's yeast), targeting complement (e.g., using cobra venom factor), targeting tuftsin (e.g., by splenectomy), targeting immunoglobulins (e.g., using anti-Ig), targeting T-lymphocytes (e.g., by thymectomy), or targeting interleukins (e.g., using antibodies or chemical compounds). Other considerations that may influence anti-bacterial activity in in vivo tests include, e.g., inoculum size, virulence, growth or generation time in vivo, timing of treatment, method of administration, pharmacokinetics/pharmacodynamics, and development of resistance in vivo.

Pharmaceutical Compositions and Kits

In some aspects, this disclosure provides compositions, e.g., pharmaceutically acceptable compositions, which include an antibody molecule, an antibody molecule-drug conjugate (ADC), or an antimicrobial peptide, as described herein, formulated together with a pharmaceutically acceptable carrier.

As used herein, “pharmaceutically acceptable carrier” includes any and all solvents, dispersion media, isotonic and absorption delaying agents, and the like that are physiologically compatible. The carrier can be suitable for intravenous, intramuscular, subcutaneous, parenteral, rectal, spinal, transdermal or epidermal administration (e.g., by injection or infusion). In certain embodiments, less than about 5%, e.g., less than about 4%, 3%, 2%, or 1% of the antibody molecules, ADCs, or antimicrobial peptides in the pharmaceutical composition are present as aggregates. In other embodiments, at least about 95%, e.g., at least about 96%, 97%, 98%, 98.5%, 99%, 99.5%, 99.8%, or more of the antibody molecules, ADCs, or antimicrobial peptides in the pharmaceutical composition are present as monomers. In some embodiments, the level of aggregates or monomers is determined by chromatography, e.g., high performance size exclusion chromatography (HP-SEC).

The compositions set out herein may be in a variety of forms. These include, for example, liquid, semi-solid and solid dosage forms, such as liquid solutions (e.g., injectable and infusible solutions), dispersions or suspensions, liposomes, and suppositories. A suitable form depends on the intended mode of administration and therapeutic application. Typical suitable compositions are in the form of injectable or infusible solutions. One suitable mode of administration is parenteral (e.g., intravenous, subcutaneous, intraperitoneal, intramuscular). In some embodiments, the antibody molecule, ADC, or antimicrobial peptide is administered by intravenous infusion or injection. In certain embodiments, the antibody, ADC, or antimicrobial peptide is administered by intramuscular or subcutaneous injection.

The phrases “parenteral administration” and “administered parenterally” as used herein means modes of administration other than enteral and topical administration, usually by injection, and includes, without limitation, intravenous, intramuscular, intraarterial, intrathecal, intracapsular, intraorbital, intracardiac, intradermal, intraperitoneal, transtracheal, subcutaneous, subcuticular, intraarticular, subcapsular, subarachnoid, intraspinal, epidural and intrasternal injection and infusion.

Therapeutic compositions typically should be sterile and stable under the conditions of manufacture and storage. The composition can be formulated as a solution, microemulsion, dispersion, liposome, or other ordered structure suitable to high antibody concentration. Sterile injectable solutions can be prepared by incorporating the active compound (i.e., antibody or antibody portion) in the required amount in an appropriate solvent with one or a combination of ingredients enumerated above, as required, followed by filtered sterilization. Generally, dispersions are prepared by incorporating the active compound into a sterile vehicle that contains a basic dispersion medium and the required other ingredients from those enumerated above. In the case of sterile powders for the preparation of sterile injectable solutions, the preferred methods of preparation are vacuum drying and freeze-drying that yields a powder of the active ingredient plus any additional desired ingredient from a previously sterile-filtered solution thereof. The proper fluidity of a solution can be maintained, for example, by the use of a coating such as lecithin, by the maintenance of the required particle size in the case of dispersion and by the use of surfactants. Prolonged absorption of injectable compositions can be brought about by including in the composition an agent that delays absorption, for example, monostearate salts and gelatin.

The antibody molecules ADC, or antimicrobial peptide can be administered by a variety of methods. Several are known in the art, and for many therapeutic, prophylactic, or diagnostic applications, an appropriate route/mode of administration is intravenous injection or infusion. For example, the antibody molecules, ADC, or antimicrobial peptide can be administered by intravenous infusion at a rate of less than 10 mg/min; preferably less than or equal to 5 mg/min to reach a dose of about 1 to 100 mg/m², preferably about 5 to 50 mg/m², about 7 to 25 mg/m² and more preferably, about 10 mg/m². As will be appreciated by the skilled artisan, the route and/or mode of administration will vary depending upon the desired results. In certain embodiments, the active compound may be prepared with a carrier that will protect the compound against rapid release, such as a controlled release formulation, including implants, transdermal patches, and microencapsulated delivery systems. Biodegradable, biocompatible polymers can be used, such as ethylene vinyl acetate, polyanhydrides, polyglycolic acid, collagen, polyorthoesters, and polylactic acid. Many methods for the preparation of such formulations are patented or generally known to those skilled in the art. See, e.g., Sustained and Controlled Release Drug Delivery Systems, J. R. Robinson, ed., Marcel Dekker, Inc., New York, 1978.

In certain embodiments, an antibody molecule, ADC, or antimicrobial peptide can be orally administered, for example, with an inert diluent or an assimilable edible carrier. The antibody molecule, ADC, or antimicrobial peptide (and other ingredients, if desired) may also be enclosed in a hard or soft shell gelatin capsule, compressed into tablets, or incorporated directly into the subject's diet. For oral therapeutic administration, the antibody molecule, ADC, or antimicrobial peptide may be incorporated with excipients and used in the form of ingestible tablets, buccal tablets, troches, capsules, elixirs, suspensions, syrups, wafers, and the like. To administer an antibody molecule, ADC, or antimicrobial peptide by other than parenteral administration, it may be necessary to coat the compound with, or co-administer the compound with, a material to prevent its inactivation. Therapeutic, prophylactic, or diagnostic compositions can also be administered with medical devices, and several are known in the art.

Dosage regimens are adjusted to provide the desired response (e.g., a therapeutic, prophylactic, or diagnostic response). For example, a single bolus may be administered, several divided doses may be administered over time or the dose may be proportionally reduced or increased as indicated by the exigencies of the therapeutic situation. It is especially advantageous to formulate parenteral compositions in dosage unit form for ease of administration and uniformity of dosage. Dosage unit form as used herein refers to physically discrete units suited as unitary dosages for the subjects to be treated; each unit contains a predetermined quantity of active compound calculated to produce the desired therapeutic effect in association with the required pharmaceutical carrier. The specification for the dosage unit forms are dictated by and directly dependent on (a) the unique characteristics of the antibody molecule, ADC, or antimicrobial peptide, and the particular therapeutic, prophylactic, or diagnostic effect to be achieved, and (b) the limitations inherent in the art of compounding such an antibody molecule, ADC, or antimicrobial peptide for the treatment of sensitivity in individuals.

An exemplary, non-limiting range for a therapeutically, prophylactically, or diagnostically effective amount of an antibody molecule, ADC, or antimicrobial peptide is 0.1-100 mg/kg, e.g., 0.1-50 mg/kg or 0.1-20 mg/kg, e.g., about 1-10, 1-5, 5-10, or 1-3 mg/kg, e.g., about 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 mg/kg. The antibody molecule, ADC, or antimicrobial peptide can be administered by intravenous infusion at a rate of less than 10 mg/min, e.g., less than or equal to 5 mg/min to reach a dose of about 1 to 100 mg/m², e.g., about 5 to 50 mg/m², about 7 to 25 mg/m², e.g., about 10 mg/m². It is to be noted that dosage values may vary with the type and severity of the condition to be alleviated. It is to be further understood that for any particular subject, specific dosage regimens should be adjusted over time according to the individual need and the professional judgment of the person administering or supervising the administration of the compositions, and that dosage ranges set forth herein are exemplary only and are not intended to limit the scope or practice of the claimed compositions.

The pharmaceutical compositions herein may include a “therapeutically effective amount,” “prophylactically effective amount,” or “diagnostically effectively amount” of an antibody molecule, ADC, or antimicrobial peptide.

A “therapeutically effective amount” refers to an amount effective, at dosages and for periods of time necessary, to achieve the desired therapeutic result. A therapeutically effective amount of the antibody molecule, ADC, or antimicrobial peptide may vary according to factors such as the disease state, age, sex, and weight of the individual, and the ability of the antibody or antibody portion to elicit a desired response in the individual. A therapeutically effective amount is also one in which any toxic or detrimental effects of the antibody molecule, ADC, or antimicrobial peptide is outweighed by the therapeutically beneficial effects. A “therapeutically effective dosage” typically inhibits a measurable parameter by at least about 20%, e.g., by at least about 40%, by at least about 60%, or by at least about 80% relative to untreated subjects. The measurable parameter may be, e.g., bacterial load, fever, headache, muscle or joint pains, skin rash, bleeding, reduced platelet levels, and reduced blood pressure. The ability of an antibody molecule, ADC, or antimicrobial peptide to inhibit a measurable parameter can be evaluated in an animal model system predictive of efficacy in reducing, inhibiting, or preventing a bacterial infection. Alternatively, this property of a composition can be evaluated by examining the ability of the antibody molecule, ADC, or antimicrobial peptide to inhibit or reduce the viability of bacteria, e.g., by an in vitro assay described herein.

A “prophylactically effective amount” refers to an amount effective, at dosages and for periods of time necessary, to achieve the desired prophylactic result. Typically, since a prophylactic dose is used in subjects prior to or at an earlier stage of disease, the prophylactically effective amount will be less than the therapeutically effective amount.

A “diagnostically effective amount” refers to an amount effective, at dosages and for periods of time necessary, to achieve the desired diagnostic result. Typically, a diagnostically effective amount is one in which a bacterial infection or a related disorder can be diagnosed in vitro, ex vivo, or in vivo.

Also within this disclosure is a kit that comprises an antibody molecule, ADC, or antimicrobial peptide described herein. The kit can include one or more other elements including: instructions for use; other reagents, e.g., a label, a therapeutic agent, or an agent useful for chelating, or otherwise coupling, an antibody molecule, ADC, or antimicrobial peptide to a label or therapeutic agent, or a radioprotective composition; devices or other materials for preparing the antibody molecule, ADC, or antimicrobial peptide for administration; pharmaceutically acceptable carriers; and devices or other materials for administration to a subject.

Nucleic Acids

The present disclosure also features nucleic acids comprising nucleotide sequences that encode the antibody molecules (e.g., heavy and light chain variable regions and CDRs of the antibody molecules), antibody molecule-drug conjugates (e.g., heavy and light chain variable regions and CDRs of the antibody molecule-drug conjugates), or antimicrobial peptide, as described herein.

For example, the present disclosure features a first and second nucleic acid encoding heavy and light chain variable regions, respectively, of an antibody molecule chosen from one or more of the antibody molecules disclosed herein, e.g., an antibody molecule of Table 1 or 8, or a portion of an antibody molecule, e.g., the variable regions of Table 1 or 8. The nucleic acid can comprise a nucleotide sequence encoding any one of the amino acid sequences in the tables herein, or a sequence substantially identical thereto (e.g., a sequence at least about 85%, 90%, 95%, 99% or more identical thereto, or which differs by no more than 3, 6, 15, 30, or 45 nucleotides from the sequences shown in the tables herein).

In certain embodiments, the nucleic acid can comprise a nucleotide sequence encoding at least one, two, or three CDRs from a heavy chain variable region having an amino acid sequence as set forth in the tables herein, or a sequence substantially homologous thereto (e.g., a sequence at least about 85%, 90%, 95%, 99% or more identical thereto, and/or having one or more substitutions, e.g., conserved substitutions). In some embodiments, the nucleic acid can comprise a nucleotide sequence encoding at least one, two, or three CDRs from a light chain variable region having an amino acid sequence as set forth in the tables herein, or a sequence substantially homologous thereto (e.g., a sequence at least about 85%, 90%, 95%, 99% or more identical thereto, and/or having one or more substitutions, e.g., conserved substitutions). In some embodiments, the nucleic acid can comprise a nucleotide sequence encoding at least one, two, three, four, five, or six CDRs from heavy and light chain variable regions having an amino acid sequence as set forth in the tables herein, or a sequence substantially homologous thereto (e.g., a sequence at least about 85%, 90%, 95%, 99% or more identical thereto, and/or having one or more substitutions, e.g., conserved substitutions).

In certain embodiments, the nucleic acid can comprise a nucleotide sequence encoding at least one, two, or three CDRs from a heavy chain variable region having the nucleotide sequence as set forth in Table 2, a sequence substantially homologous thereto (e.g., a sequence at least about 85%, 90%, 95%, 99% or more identical thereto, and/or capable of hybridizing under the stringency conditions described herein). In some embodiments, the nucleic acid can comprise a nucleotide sequence encoding at least one, two, or three CDRs from a light chain variable region having the nucleotide sequence as set forth in Table 2, or a sequence substantially homologous thereto (e.g., a sequence at least about 85%, 90%, 95%, 99% or more identical thereto, and/or capable of hybridizing under the stringency conditions described herein). In certain embodiments, the nucleic acid can comprise a nucleotide sequence encoding at least one, two, three, four, five, or six CDRs from heavy and light chain variable regions having the nucleotide sequence as set forth in Table 2, or a sequence substantially homologous thereto (e.g., a sequence at least about 85%, 90%, 95%, 99% or more identical thereto, and/or capable of hybridizing under the stringency conditions described herein).

In certain embodiments, the nucleic acid comprises a nucleotide sequence as set forth in Table 2 or a sequence substantially homologous thereto (e.g., a sequence at least about 85%, 90%, 95%, 99% or more identical thereto, and/or capable of hybridizing under the stringency conditions described herein). In some embodiments, the nucleic acid comprises a portion of a nucleotide sequence as set forth in Table 2 or a sequence substantially homologous thereto (e.g., a sequence at least about 85%, 90%, 95%, 99% or more identical thereto, and/or capable of hybridizing under the stringency conditions described herein). The portion may encode, for example, a variable region (e.g., VH or VL); one, two, or three or more CDRs; or one, two, three, or four or more framework regions.

In certain embodiments, the nucleic acid comprises a nucleotide sequence encoding an amino acid sequence as set forth in Tables 3 or 6A-6B or in FIG. 4 or 15A-15B, or a sequence substantially homologous thereto (e.g., a sequence at least about 80%, 85%, 90%, 95% or more identical thereto, and/or capable of hybridizing under the stringency conditions described herein). In some embodiments, the nucleic acid comprises a portion of a nucleotide sequence encoding an amino acid sequence as set forth in Tables 3 or 6A-6B or in FIG. 4 or 15A-15B, or a sequence substantially homologous thereto (e.g., a sequence at least about 80%, 85%, 90%, 95%, or more identical thereto, and/or capable of hybridizing under the stringency conditions described herein).

The nucleic acids disclosed herein include deoxyribonucleotides or ribonucleotides, or analogs thereof. The polynucleotide may be either single-stranded or double-stranded, and if single-stranded may be the coding strand or non-coding (antisense) strand. A polynucleotide may comprise modified nucleotides, such as methylated nucleotides and nucleotide analogs. The sequence of nucleotides may be interrupted by non-nucleotide components. A polynucleotide may be further modified after polymerization, such as by conjugation with a labeling component. The nucleic acid may be a recombinant polynucleotide, or a polynucleotide of genomic, cDNA, semisynthetic, or synthetic origin which either does not occur in nature or is linked to another polynucleotide in a non-natural arrangement.

In some aspects, the application features host cells and vectors containing the nucleic acids described herein. The nucleic acids may be present in a single vector or separate vectors present in the same host cell or separate host cell, as described in more detail below.

Vectors

Further provided herein are vectors that comprise nucleotide sequences encoding an antibody molecule, antibody molecule-drug conjugate (ADC), or antimicrobial peptide, described herein. In some embodiments, the vectors comprise nucleotides encoding an antibody molecule described herein. In some embodiments, the vectors comprise the nucleotide sequences described herein. The vectors include, but are not limited to, a virus, plasmid, cosmid, lambda phage or a yeast artificial chromosome (YAC).

Numerous vector systems can be employed. For example, one class of vectors utilizes DNA elements which are derived from animal viruses such as, for example, bovine papilloma virus, polyoma virus, adenovirus, vaccinia virus, baculovirus, retroviruses (Rous Sarcoma Virus, MMTV or MOMLV) or SV40 virus. Another class of vectors utilizes RNA elements derived from RNA viruses such as Semliki Forest virus, Eastern Equine Encephalitis virus and Flaviviruses.

Additionally, cells which have stably integrated the DNA into their chromosomes may be selected by introducing one or more markers which allow for the selection of transfected host cells. The marker may provide, for example, prototropy to an auxotrophic host, biocide resistance (e.g., antibiotics), or resistance to heavy metals such as copper, or the like. The selectable marker gene can be either directly linked to the DNA sequences to be expressed, or introduced into the same cell by cotransformation. Additional elements may also be needed for optimal synthesis of mRNA. These elements may include splice signals, as well as transcriptional promoters, enhancers, and termination signals.

Once the expression vector or DNA sequence containing the constructs has been prepared for expression, the expression vectors may be transfected or introduced into an appropriate host cell. Various techniques may be employed to achieve this, such as, for example, protoplast fusion, calcium phosphate precipitation, electroporation, retroviral transduction, viral transfection, gene gun, lipid based transfection or other conventional techniques. In the case of protoplast fusion, the cells are grown in media and screened for the appropriate activity.

Methods and conditions for culturing the resulting transfected cells and for recovering the antibody molecule, anti-bacterial peptide, or antibody molecule-drug conjugate produced are known to those skilled in the art, and may be varied or optimized depending upon the specific expression vector and mammalian host cell employed, based upon the present description.

Cells

The present disclosure also provides host cells comprising a nucleic acid encoding an antibody molecule, anti-bacterial peptide, or antibody molecule-drug conjugate as described herein. For example, the host cells may comprise a nucleic acid of Table 2, a sequence substantially homologous thereto (e.g., a sequence at least about 85%, 90%, 95%, 99% or more identical thereto, and/or capable of hybridizing under the stringency conditions described herein), or a portion of one of said nucleic acids. Additionally, the host cells may comprise a nucleic acid encoding an amino acid sequence described in Tables 1, 3, 6A-6B, or 8, a sequence substantially homologous thereto (e.g., a sequence at least about 80%, 85%, 90%, 95%, 99% or more identical thereto), or a portion of one of said sequences.

In some embodiments, the host cells are genetically engineered to comprise nucleic acids encoding the antibody molecule, ADC, or antimicrobial peptide.

In certain embodiments, the host cells are genetically engineered by using an expression cassette. The phrase “expression cassette,” refers to nucleotide sequences, which are capable of affecting expression of a gene in hosts compatible with such sequences. Such cassettes may include a promoter, an open reading frame with or without introns, and a termination signal. Additional factors necessary or helpful in effecting expression may also be used, such as, for example, an inducible promoter.

The disclosure also provides host cells comprising the vectors described herein.

The cell can be, but is not limited to, a eukaryotic cell, a bacterial cell, an insect cell, or a human cell. Suitable eukaryotic cells include, but are not limited to, Vero cells, HeLa cells, COS cells, CHO cells, HEK293 cells, BHK cells and MDCKII cells. Suitable insect cells include, but are not limited to, Sf9 cells.

Uses of Antibody Molecules, Antibody Molecule-Drug Conjugates, and Antimicrobial Peptides

The antibody molecules, antibody molecule-drug conjugates (ADCs), or antimicrobial peptides disclosed herein, as well as the pharmaceutical compositions disclosed herein, have in vitro, ex vivo, and in vivo therapeutic, prophylactic, and/or diagnostic utilities.

In an embodiment, the antibody molecule, ADC, or antimicrobial peptide, inhibits or reduces the viability of bacteria, e.g., Gram-negative bacteria. For example, these molecules can be administered to cells in culture, in vitro or ex vivo, or to a subject, e.g., a human subject, e.g., in vivo, to inhibit or reduce the viability of bacteria, e.g., Gram-negative bacteria. Accordingly, in an aspect, the disclosure provides a method of treating or preventing a bacterial infection in a subject, comprising administering to the subject an antibody molecule, ADC, or antimicrobial peptide, described herein, such that the bacterial infection is treated or prevented. For example, these antibody molecules can be administered to cells in culture, e.g. in vitro or ex vivo, or in a subject, e.g., in vivo, to treat, prevent, and/or diagnose a bacterial infection, or to inhibit or reduce a bacterial infection.

As used herein, the term “subject” is intended to include human and non-human animals In some embodiments, the subject is a human subject, e.g., a human patient infected with bacteria, e.g., disease-causing bacteria, e.g., Gram-negative bacteria, or at risk of being infected with bacteria, e.g., disease-causing bacteria, e.g., Gram-negative bacteria. The term “non-human animals” includes mammals and non-mammals, such as non-human primates. In some embodiments, the subject is a human. The methods and compositions described herein are suitable for treating human patients infected with bacteria, e.g., disease-causing bacteria, e.g., Gram-negative bacteria. Patients infected with bacteria, e.g., disease-causing bacteria, e.g., Gram-negative bacteria include those who have been exposed to the bacteria but are (at least temporarily) asymptomatic, patients having a bacterial infection, or patients having a disorder related to a bacterial infection.

Methods of Treating or Preventing Bacterial Infection

Gram-negative bacteria display lipopolysaccharides (LPS) on the outer membrane of the bacteria. While not wishing to be bound by theory, in an embodiment, the antibody molecules, antibody molecule-drug conjugates (ADCs), or antimicrobial peptides described herein can inhibit or reduce the viability of Gram-negative bacteria, at least in part, by binding to LPS.

The antibody molecules, ADCs, and antimicrobial peptides described herein, can be used to treat or prevent bacterial infections, as well as disorders, conditions or symptoms associated with bacterial infections.

In an embodiment, the bacterial infection is caused by one or more of the following bacteria: Klebsiella pneumonia (e.g., Klebsiella pneumoniae subsp. ozaenae, Klebsiella pneumoniae subsp. pneumoniae, or Klebsiella pneumoniae subsp. rhinoscleromatis), Enterobacter cancerogenous, Enterobacter cloacae, Enterobacter hormaechei, Enterobacter asburiae, Shigella boydii, Shigella dysenteriae, Shigella flexneri, Shigella sonnei, Escherichia coli (e.g., Escherichia coli ATCC 11775, Escherichia coli ATCC 25922, Escherichia coli ATCC 35401, or Escherichia coli ATCC 43895), Escherichia fergusonii, Salmonella choleraesuis, Salmonella choleraesuis subsp. indica, Salmonella enteritidis, Salmonella virchow, Salmonella paratyphi B, Salmonella typhimurium, Salmonella paratyphi A, Salmonella typhi, Salmonella choleraesuis subsp. arizonae, Salmonella choleraesuis subsp. diarizonae, Salmonella choleraesuis subsp. houtenae, Salmonella bongori, Citrobacter sedlakii, Citrobacter braakii, Citrobacter werkmanii, Citrobacter freundii, Citrobacter youngae, Citrobacter amalonaticus, Yersinia enterocolitica, Yersinia frederiksenii, Yersinia pestis, Yersinia pseudotuberculosis, or any combination thereof.

In an embodiment, the bacterial infection is caused by one or more of: Enterococcus faecium (e.g., vancomycin-resistant (VRE) Enterococcus faecium), Staphylococcus aureus (e.g., methicillin-resistant (MRSA) Staphylococcus aureus), Clostridium difficile, Acinetobacter baumannii (e.g., multidrug resistant (MDR) Acinetobacter), Pseudomonas aeruginosa (e.g., multidrug resistant (MDR) P. aeruginosa, e.g., carbapenem-resistant P. aeruginosa), Enterobacteriaceae (e.g., E. coli, K. pneumoniae, or Enterobacter spp., e.g., carbapenem-resistant Enterobacteriaceae (CRE)), N. gonorrhoaeae (e.g., drug-resistant N. gonorrhoaeae), Salmonella (e.g., drug resistant Salmonella), Shigella (e.g., drug-resistant Shigella), a bacterium producing an extended spectrum β-lactamase (ESBL), or Mycobacterium tuberculosis (e.g., drug-resistant M. tuberculosis).

Exemplary disorders or conditions that can be associated with bacterial infections include, but are not limited to pneumonia (e.g., community-acquired pneumonia and hospital-acquired pneumonia), a urinary tract infection (UTI), septicemia, meningitis, diarrhea (e.g., traveler's diarrhea), a soft tissue infection, a skin infection, bacteremia, a respiratory system infection (e.g., a lower respiratory tract infection), endocarditis, an intra-abdominal infection, septic arthritis, osteomyelitis, a CNS infection, an ophthalmic infection, cholecystitis, cholangitis, meningitis (e.g., neonatal meningitis), typhoid fever, food poisoning, gastroenteritis, enteric fever, shigellosis, a blood stream infection, intra-abdominal sepsis, a brain abscess, meningitis, sepsis (e.g., neonatal sepsis), a joint infection, a bone infection, a gastrointestinal infection, or a wound infection.

Certain antibody molecules, ADCs, and antimicrobial peptides described herein are capable of treating at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 25, 30, 35, 40, 50, 100, 200, or more bacteria (e.g., Gram-negative bacteria) of different genera, species, subspecies, and/or strains. Accordingly, in an embodiment, the antibody molecule, ADC, or antimicrobial peptide is administered to a patient infected with or with a risk of being infected with bacterial infection, when no test has been performed to determine the genus, species. subspecies, and/or strain of the bacteria, e.g., the type of infected or disease-causing bacteria may be unknown.

The antibody molecules, ADCs, or antimicrobial peptides are typically administered at a frequency that keeps a therapeutically effective level of antibody molecules, ADCs, or antimicrobial peptides in the patient's system until the patient recovers. For example, the antibody molecules, ADCs, or antimicrobial peptides may be administered at a frequency that achieves a serum concentration sufficient for at least about 1, 2, 5, 10, 20, 30, or 40 antibody molecules, ADCs, or antimicrobial peptides to bind each bacterium. In an embodiment, the antibody molecules, ADCs, or antimicrobial peptides are administered every 1, 2, 3, 4, 5, 6, or 7 days.

Methods of administering various antibody molecules, ADCs, or antimicrobial peptides are known in the art and are described below. Suitable dosages of the antibody molecules, ADCs, or antimicrobial peptides used will depend on the age and weight of the subject and the particular drug used.

The antibody molecules or antimicrobial peptides can be used by themselves or conjugated to a second agent, e.g., an antibacterial agent, toxin, or protein, e.g., a second anti-bacterial (e.g., anti-LPS) antibody molecule or antimicrobial peptide. This method includes: administering the antibody molecule or antimicrobial peptide, alone or conjugated to a second agent, to a subject requiring such treatment. The antibody molecules can be used to deliver a variety of therapeutic agents, e.g., a toxin or anti-viral agent, or mixtures thereof.

Combination Therapies

The antibody molecules, antibody molecule-drug conjugates (ADCs), and antimicrobial peptides can be used in combination with other therapies. For example, the combination therapy can include an antibody molecule, ADC, or antimicrobial peptide co-formulated with, and/or co-administered with, one or more additional therapeutic agents, e.g., anti-bacterial agents (including antibiotics or other anti-bacterial antibodies), vaccines, or agents that enhance an immune response. In other embodiments, the antibody molecules, anti-bacterial peptides, or antibody molecule-drug conjugates are administered in combination with other therapeutic treatment modalities, such as intravenous hydration, fever-reducing agents (such as acetaminophen), or blood transfusion. Such combination therapies may advantageously utilize lower dosages of the administered therapeutic agents, thus avoiding possible toxicities or complications associated with the various monotherapies.

Administered “in combination”, as used herein, means that two (or more) different treatments are delivered to the subject before, or during the course of the subject's affliction with a bacterial infection or disease. In one embodiment, two or more treatments are delivered prophylactically, e.g., before the subject is infected or diagnosed with bacteria, e.g., Gram-negative bacteria. In another embodiment, the two or more treatments are delivered after the subject has been infected or diagnosed with bacteria, e.g., Gram-negative bacteria. In some embodiments, the delivery of one treatment is still occurring when the delivery of the second begins, so that there is overlap. This is sometimes referred to herein as “simultaneous” or “concurrent delivery.” In other embodiments, the delivery of one treatment ends before the delivery of the other treatment begins. In some embodiments of either case, the treatment is more effective because of combined administration. For example, the second treatment is more effective, e.g., an equivalent effect is seen with less of the second treatment, or the second treatment reduces symptoms to a greater extent, than would be seen if the second treatment were administered in the absence of the first treatment, or the analogous situation is seen with the first treatment. In some embodiments, delivery is such that the reduction in a symptom, or other parameter related to the bacterial infection or disorder is greater than what would be observed with one treatment delivered in the absence of the other. The effect of the two treatments can be partially additive, wholly additive, or greater than additive. The delivery can be such that an effect of the first treatment delivered is still detectable when the second is delivered.

In some embodiment, the additional antimicrobial agent is an antibiotic. For example, the antibiotic can be a beta-lactam antibiotic (e.g., a penicillin, a cephalosporin, a monobactam, or a carbapenem), a monobactam, a carbapenem, a macrolide, a lincosamide, a streptogramin, an aminoglycoside, a quinolone, a sulfonamide, a tetracycline, a glycopeptide, a lipoglycopeptide, an oxazolidinone, a rifamycin, a polypeptide, or a tuberactinomycin. Exemplary antibiotics include, but are not limited to, amikacin, amoxicillin, ampicillin, azithromycin, aztreonam, bacampicillin, bacitracin, balofloxacin, besifloxacin, capreomycin, carbenicillin, cefacetrile (cephacetrile), cefaclomezine, cefaclor, cefadroxil (cefadroxyl), cefalexin (cephalexin), cefaloglycin (cephaloglycin), cefalonium (cephalonium), cefaloram, cefaloridine (cephaloradine), cefalotin (cephalothin), cefamandole, cefaparole, cefapirin (cephapirin), cefatrizine, cefazaflur, cefazedone, cefazolin (cephazolin), cefcanel, cefcapene, cefclidine, cefdaloxime, cefdinir, cefditoren, cefedrolor, cefempidone, cefepime, cefetamet, cefetrizole, cefivitril, cefixime, cefluprenam, cefmatilen, cefmenoxime, cefmepidium, cefmetazole, cefodizime, cefonicid, cefoperazone, cefoselis, cefotaxime, cefotetan, cefovecin, cefoxazole, cefoxitin, cefozopran, cefpimizole, cefpirome, cefpodoxime, cefprozil (cefproxil), cefquinome, cefradine (cephradine), cefrotil, cefroxadine, cefsumide, ceftaroline, ceftaroline (teflaro), ceftazidime, cefteram, ceftezole, ceftibuten, ceftiofur, ceftiolene, ceftioxide, ceftizoxime, ceftobiprole, ceftriaxone, cefuracetime, cefuroxime, cefuzonam, chloramphenicol, ciprofloxacin, clarithromycin, clinafloxacin, clindamycin, cloxacillin, cycloserine, daptomycin (cubicin), demeclocycline, dicloxacillin, dirithromycin, doripenem, doxycycline, enoxacin, ertapenem, erythromycin, flucloxacillin, flumequine, gatifloxacin, gemifloxacin, gemifloxacin (factive), gentamicin, grepafloxacin, imipenem, imipenem/cilastatin, kanamycin, levofloxacin, lincomycin, linezolid, lomefloxacin, macrocyclics, meropenem, metronidazole, mezlocillin, minocycline, moxifloxacin, nadifloxacin, nafcillin, nalidixic acid, neomycin, netilmicin, nitrofurantoin, norfloxacin, ofloxacin, oxacillin, oxolinic acid, oxytetracycline, paromomycin, pazufloxacin, pefloxacin, penicillin g, penicillin v, pipemidic acid, piperacillin, piromidic acid, pivampicillin, pivmecillinam, polymyxin b, pristinamycin, prulifloxacin, quinupristin/dalfopristin, rifabutin, rifampin, rifapentine, rosoxacin, roxithromycin, rufloxacin, sitafloxacin, sparfloxacin, streptomycin, sulfamethizole, sulfamethoxazole, sulfisoxazole, teicoplanin, telavancin, telavancin (vibativ), telithromycin, temafloxacin, tetracycline, ticarcillin, tigecycline, tinidazole, tobramycin, tosufloxacin, trimethoprim-sulfamethoxazole, trovafloxacin, vancomycin, viomycin, or zeocin.

In some embodiments, the additional anti-bacterial agent is a vaccine. The vaccine may be, e.g., live, attenuated, or inactivated bacteria, e.g., anthrax vaccine (e.g., BIOTHRAX®), DTaP vaccine (e.g., DAPTACEL® or INFANRIX®), DT vaccine, Haemophilus influenzae type b (Hib) vaccine (e.g., ACTHIB®, HIBERIX®, or PEDVAXHIB®), meningococcal vaccine (e.g., MENOMUNE®, MENACTRA®, MENVEO®, TRUMENBA®, or BEXSERO®), pneumococcal vaccine (e.g., PNEUMOVAX® 23 or PREVNAR® 13), tetanus/diphtheria vaccine (e.g., DECAVAC® or TENIVAC®), tetanus/diphtheria/pertussis vaccine (e.g., BOOSTRIX® or ADACEL®), typhoid vaccine (e.g., TYPHIM VI® or VIVOTIF®), DTaP/polio vaccine (e.g., KINRIX®), DTaP/hepatitis B/polio vaccine (e.g., PEDIARIX®), DTaP/polio/Haemophilus influenza type b vaccine (e.g., PENTACEL®), Haemophilus influenza type b/hepatitis B vaccine (e.g., COMVAX®), and Haemophilus influenza type b/meningococcal vaccine (e.g., MENHIBRIX®).

In certain embodiments, the additional antiviral agent is a second antibody molecule, ADC, or antimicrobial peptide, e.g., an antibody molecule, ADC, or antimicrobial peptide different from a first antibody molecule, ADC, or antimicrobial peptide. Exemplary antibody molecules that can be used in combination include, but are not limited to, any combination of the antibody molecules listed in Table 1 or 8.

In some embodiments, the additional anti-bacterial agent is an antimicrobial (e.g., antibacterial) peptide. Exemplary antimicrobial peptides include, but are not limited to, pexiganan acetate (MSI 78), omiganan (MX-226/MBI-226 or CLS001), iseganan (IB-367), hLF1-11, XOMA 629, PAC-113, CZEN-002, IMX942, OP-145, Ghrelin, PMX-30063, delmitide (RDP58), plectasin, and HB1345.

In some embodiments, the additional anti-bacterial agent is a resistance-modifying agent. Exemplary resistance-modifying agents include, but are not limited to, an efflux inhibitor (e.g., Phe-Arg-β-naphthylamide) and beta-lactamase inhibitor (e.g., clavulanic acid or sulbactam).

Methods of Diagnosis

In some aspects, the present disclosure provides a diagnostic method for detecting the presence of a bacterium in vitro (e.g., in a biological sample, such as a blood sample) or in vivo (e.g., in vivo imaging in a subject). The method includes: (i) contacting the sample with an antibody molecule or antibody molecule-drug conjugate (ADC) described herein, or administering to the subject, the antibody molecule or ADC; (optionally) (ii) contacting a reference sample, e.g., a control sample (e.g., a control biological sample, such as plasma or blood) or a control subject with an antibody molecule or ADC described herein; and (iii) detecting formation of a complex between the antibody molecule or ADC, and the sample or subject, or the control sample or subject, wherein a change, e.g., a statistically significant change, in the formation of the complex in the sample or subject relative to the control sample or subject is indicative of the presence of the bacterium in the sample. The antibody molecule or ADC can be directly or indirectly labeled with a detectable substance to facilitate detection of the bound or unbound antibody. Suitable detectable substances include various enzymes, prosthetic groups, fluorescent materials, luminescent materials and radioactive materials, as described above and described in more detail below.

The term “sample,” as it refers to samples used for detecting bacteria includes, but is not limited to, cells, cell lysates, proteins or membrane extracts of cells, body fluids such as blood, or tissue samples.

Complex formation between the antibody molecule or ADC, and a bacterium or lipopolysaccharide, can be detected by measuring or visualizing either the antibody molecule or antibody molecule-drug conjugate bound to the bacterium or lipopolysaccharide or unbound antibody molecule or ADC. Any suitable detection assays can be used, and conventional detection assays include an enzyme-linked immunosorbent assays (ELISA), a fluorescence-activated cell sorting (FACS) assay, a radioimmunoassay (RIA) or tissue immunohistochemistry. Alternative to labeling the antibody molecule or ADC, the presence of a bacterium or lipopolysaccharide can be assayed in a sample by a competition immunoassay utilizing standards labeled with a detectable substance and an unlabeled antibody molecule or ADC. In this assay, the biological sample, the labeled standards and the antibody molecule or ADC are combined and the amount of labeled standard bound to the unlabeled binding molecule is determined. The amount of bacteria or lipopolysaccharides in the sample is inversely proportional to the amount of labeled standard bound to the antibody molecule or ADC.

EXAMPLES Example 1: In Vitro Evaluation of Candidate Antibody Molecules by Opsonophagocytic Assay (OPA)

Candidate antibody molecules were evaluated in vitro for opsonophagocytic killing activity against multiple gram-negative bacteria. The opsonophagocytic assay (OPA) evaluates the ability of an antibody molecule to opsonize bacteria in the presence of complement and neutrophils. Opsonization of bacteria is a major pathway by which antibodies have been shown to kill bacteria in vivo. Activity in this assay is a pre-requisite for selection and further evaluation of antibody molecules in vivo.

Briefly, the following assay components were utilized:

Complement (C′): normal human serum adsorbed with specific bacterial test strain.

Neutrophils: fresh human blood from healthy adult donors.

Bacteria: E. coli ATCC strain 25922.

Positive controls: opsonic polyclonal IgG (pAb) to each bacterium tested.

Screening: antibody molecules were screened for OPA from 0.1 μg/ml to 25 μg/ml.

The complement reagent was prepared by adsorption of bacterial specific antibody molecules from normal human serum. Briefly, ˜10⁹ CFU bacteria were suspended in serum (10 mL) and incubated on ice for 30 min with mixing. The sample was centrifuged and the serum was transferred and resuspended in 10⁹ CFU bacteria. This was incubated on ice with mixing for an additional 30 min. The serum/complement was recovered by centrifugation and sterilized by filtration through a 0.22 μM filter.

Polymorphonuclear cells (PMNs) were prepared from a single donor. Fresh human blood was mixed with an equal volume of HISTOPAQUE® and incubated for 1 hour at 37° C. The upper layer was collected and cells pelleted by centrifugation at 250 g for 5 min. The remaining erythrocytes were lysed with 1% NH₄Cl by incubation at room temperature for 10 min. The cells were washed and re-suspended in MEM. The cell viability was determined by trypan blue and suspended to a final concentration of 5×10⁶ cells/ml.

Bacteria were prepared by seeding a 6 ml tube of Mueller Hinton Broth, cation adjusted (MHB), to a 600 nM absorbance of 0.1 from and overnight growth of E. coli 25922 on a blood agar plate. The cells were grown to mid-log phase (A_(600 nm)=0.6-1.0) and then diluted in 0.9% saline to an A_(600 nM)=0.2. This provided a culture at approximately 1×10⁸ cfu/ml. The culture was diluted 1:100 in Minimal Essential Medium (MEM) to obtain a culture at 1×10⁶ cfu/ml. This was the bacterial suspension us in the OPA. The culture absorbance required varied amongst bacterial strains.

Each run of the assay contained multiple controls and test articles. In addition to bacteria, the assay groups were stratified by: C′ alone, PMNs+C′, PMNs+heat inactivated C′, PMNs+C′+non-specific mAb; PMNs+C′+positive control pAb, C′+positive control pAb, PMNs+C′+test article mAbs (dilution series). The OPA was performed as follows. 100 μl each of PMN suspension, the bacterial suspension, the antisera or antibody, and the complement, were mixed for a total volume of 400 μl. A 25 μl sample was taken from this mixture immediately at T=0. After incubation in a rotating rack at 37° C. for 90 minutes, a sample was taken again at T=90 minutes. The samples were diluted 1:10 into 225 μl TSB+0.05% Tween to lyse the white blood cells (alternative lysis saponin). Samples were plated onto duplicate TSA plates (100 μl each) and incubated overnight at 37 C. Since the preparation was 1×10⁶ CFU/ml and there was 0.1 ml/tube in a final volume of 0.4 ml, there would be 250,000 CFU/ml. Plating a 1:100 of that should yield a readily countable 250 CFUs per plate in duplicate. A one log drop would be 25 CFUs per plate. Temperature was adjusted for each bacterial species to obtain better resolution. The plates were counted. The reduction was calculated in the number of CFUs at T=90 minutes as compared to T=0 and reported as the percentage of killing. At least a one log drop would be desirable.

Antibody molecules were ranked based on their OPA activity against E. coli. The antibody molecules having the highest OPA activity against E. coli. would be selected for in vivo evaluation.

Methods for performing an OPA assay is also described, e.g., in Hemachandra et al. Infect Immun. 2001; 69(4): 2223-2229, which is incorporated by reference in its entirety.

The methods described herein can also be used to evaluate the in vitro opsonophagocytic killing activity of the antibody molecule-drug conjugates against multiple Gram negative bacteria.

Example 2: Minimal Inhibitory Concentration Assay

The minimal inhibitory concentration (MIC) assay was performed based on standards and practices published by the CLSI (documents M07-A9, M100-24). It was used to determine minimum inhibitory concentrations for test compounds against several microbial species using broth microdilution. The assay mixes compounds with bacteria in the presence of rich broth and measures the minimum concentration of compound at which bacterial growth is decreased by at least 80%. The assay can use a 96-well plate/high throughput format such that compounds can be tested against a large panel of bacterial strains simultaneously. For each test strain there is a published inhibitory standard and results for standards, published in CSLI documents, should fall within two-fold of published values and should not vary more than two-fold in subsequent tests.

The procedures are described as follows:

On Day 1, all strains to be used in the assay were taken from −80° C. storage, thawed on ice, and subcultured to an appropriate agar plate using a 10 μl inoculating loop. All plates were placed at 37° C. overnight. Alternatively, strains can be subcultured from a fresh overnight agar plate or a refrigerated agar plate less than one week old.

On Day 2, all overnight plates were examined for homology and appropriate colony morphology. All strains were subcultured to an appropriate agar plate using a 10 μl inoculating loop. All plates were placed at 37° C. overnight.

On Day 3, all overnight plates were examined for homology and appropriate colony morphology. Mother plates were prepared for test compounds and standards. In a 96 well polypropylene plate, 40 μl of a 50× concentration of compound (50 times the desired top final assay concentration) was placed in column 1 (8 compounds per plate). 20 μl diluent was placed in columns 2-12. 20 μl was carried into 20 μl (doubling dilutions) across the plate, in columns 2-11. Column 12 was used as a growth control. The diluent can vary depending on the solubility of the compound (common diluents are water, DMSO, and 0.1 N HCl).

Concentration ranges can also be varied depending on the efficacy of the compounds. Typically, compounds were resuspended at 3.2 mg/ml for a top final assay concentration of 64 μg/ml, however, less efficacious compounds were resuspended at 25.6 mg/ml for a top final assay concentration of 512 μg/ml. Alternatively, compounds with even higher MICs or compounds whose stock is at a low starting concentration can be run using an alternate protocol for high concentration MIC determinations in which the compound is diluted directly in the assay plate using 40 μl undiluted stock in column 1 and 20 μl is carried into 20 μl across the plate columns 2-11. The assay then adds 80 μl (as opposed to 100 μl) of cultured media so that the compound dilution is only 1:5 (instead of 1:50).

Daughter plates were prepared as follows. Daughter plates were stamped from the mother plate by carrying 2 μl from each row of the mother plate to a corresponding row in the daughter plate, making one daughter plate for each strain to be tested.

Cultured media were prepared as follows. For each strain to be tested, a culture equivalent to McFarland 0.5 was prepared. A 10 μl inoculating loop was used to seed cells from overnight agar plates into 10 ml Pyrex tubes containing 5 ml of 0.85% Saline. Using a densitometer, each tube was adjusted to 0.5 McFarland units by adding more cells or saline. These cultures should contain approximately 1×10⁸ cells/ml. These cultures were diluted to 1:200 in appropriate media to reduce the cell concentration to approximately 5×10⁵ cells/ml. The exception to this is strains of yeast including C. albicans, which should be diluted 1:2000. Each plate was seeded with each diluted culture with 100 μl per well (approximately 10 ml per plate). All daughter plates were seeded with 100 μl/well of appropriate culture. All plates were set at 37° C. overnight.

On Day 4, all plates were read 18 hours after seeding using a mirrored plate reader and reflected incandescent light. In certain experiments, the MIC was considered as the lowest concentration of compound that inhibits growth by at least 80%. The well should appear void of growth when read by eye and even a partial button would constitute observable growth. For example, as shown in FIG. 5, the duplicate MICs would be read as 3, 3, 2, 2, 6, 6, 2, 2.

For each test strain the corresponding control compound should have an MIC within 2 fold of the expected value. If controls were verified, values for all test compounds were reported.

Exemplary MIC control compound values for various strains are shown in Table 4.

TABLE 4 Exemplary MIC control compound values Strain # Name Strain MIC Control Compound MIC (ug/ml) 1 P. aeruginosa ATCC 27853 Ciprofloxacin 0.25 2 E. coli ATCC 25922 Ciprofloxacin 0.25 3 S. aureus ATCC 29213 Ciprofloxacin 0.5 4 E. coli ATCC 43745 Ciprofloxacin 0.25 5 K. pneumoniae ATCC 700603 Ciprofloxacin 0.5 6 C. albicans ATCC 90028 Amphotericin B 4.0 7 P. aeruginosa ATCC 39324 Ciprofloxacin 0.125 8 P. aeruginosa ATCC 27313 Ciprofloxacin 0.125 9 P. aeruginosa ATCC 15692 Ciprofloxacin 0.25 10 P. aeruginosa ATCC 33350 Ciprofloxacin 0.125 11 P. aeruginosa ATCC 25102 Ciprofloxacin 0.125 12 P. aeruginosa 12-4-4 Ciprofloxacin 0.125 13 P. aeruginosa PA01 Ciprofloxacin 0.25 14 P. aeruginosa PAK Ciprofloxacin 0.125 15 S. aureus MN8 Ciprofloxacin 0.25 16 A. baumannii ATCC 17978 Ciprofloxacin 0.125 17 A. baumannii ATCC 19606 Ciprofloxacin 0.5

Example 3: Targeted In Vitro Activity of Antibody Drug Conjugates

The effect of an exemplary ADC (Anti-Pseudomonas antibody with Peptide 2 fused at the C-terminus of the Heavy Chain) on binding and inhibiting bacteria was investigated. In this example, the bacterial strain ATCC 27853 was employed. The exemplary ADC displayed similar binding to bacterial surface as the antibody alone as determined by FACS (data not shown). As shown in Table 5, the ADC showed about 10-fold enhancement in activity relative to the peptide alone. The ADC also retained opsonophagocytic activity. Further, the ADC demonstrated specificity for Gram-negative pathogens as no killing of Gram-positive bacteria was observed in this experiment.

TABLE 5 Targeted In Vitro Activity Sample MIC (μg/ml) MW (g/mol) MIC (μM) MIC Per Payload (μM) Peptide Alone 16 3400 4.7 4.7 Antibody Alone — 149000 — N/A ADC 77 162000 0.48 0.95

Example 4: Generation and Testing of Exemplary Antibodies

Exemplary antibodies hWN01 and hWNv1 were designed by structure guided engineering of WN1 222-5 (Di Padova et al., Infect Immun. 1993; 61(9):3863-3872). Antibodies hWN01 and hWNv1 target the conserved core glycan of LPS and were engineered to bring them proximal to human germline and improve binding to K. pneumoniae. As shown in FIG. 2, hWN01 showed picomolar (pM) binding to E. coli and nanomolar (nM) binding to K. pneumoniae strains. In addition, hWN01 and hWNv1 are proximal to human germline sequence and have improved expression.

Exemplary antibodies 2C7, 3D6, 3E7 and 3G1 were also generated. The binding of antibodies 2C7, 3D6, 3E7 and 3G1 to representative E. coli, K. pneumoniae and S. typhimurium strains was determined by ELISA. The results are shown in FIGS. 7-10.

Example 5: Novel Scaffold for Engineering Mouse Immunization mAb A001-25

Towards identification of a broadly reactive antibody targeting the core of LPS, CD-1 mice were immunized with E. coli J5-OMP vaccine (10 μg) and Hiltonol adjuvant (10 μg). The mice were dosed intraperitoneally with the immunogen-adjuvant mix weekly for 3 weeks, at which point the sera from the immunized mice were assessed for their titers against multiple pathogens by whole cell ELISA. Mice with the highest titers against E. coli and K. pneumoniae were selected for fusion. Splenic fusions were performed with myeloma partner cells and seeded into 96-well for clonal development. Two weeks later, the hybridomas were screened for their ability to recognize E. coli J5 LPS. One such clone with binding to E. coli, K. pneumoniae and S. typhimurium by whole cell ELISA is mAb A001-25. It targets the conserved core glycan of LPS. As shown in FIG. 3, A001-25 has strong picomolar (pM) binding to E. coli and K. pneumoniae. Structural assessment based of the modeled structure indicated pathways for affinity enhancement.

Example 6: Ranking Exemplary Antimicrobial Peptides by Cascade Testing

Candidate antimicrobial peptides were tested for their inhibitory activity on bacteria and their hemolytic activity. Peptides with high killing activity against both E. coli and Pseudomonas in broth, mouse and humans serum along with low cytotoxicity or hemolytic activity were prioritized as lead candidates. The results are shown in Table 6A. Antimicrobial peptides with strong inhibitory or bactericidal activity, low red blood cell hemolysis, and low off-target toxicity, were selected for further analysis.

TABLE 6A Inhibitory Activity of Exemplary Antimicrobial Peptide on Bacteria and Hemolytic Activity SEQ ID MIC μg/ml PLC Sample Sequence NO Eco 25922 Pae 27853 μg/ml Peptide 26 ALWKTLLKKVLKAAAK 67  4   8  64 peptide 119 RGLRRLGRKIAHGVKKYGPTVLRIIRIAG 68  4   2 128 peptide 109 GIGKFLKKAKKFGKAFVKILKK 69  4   8 128 peptide 30 ALWKTLLKKVLKAAAKGGGGSGGGGS 70 64 128 512 peptide 24 GIGKFLKKAKKFGKAFVKILKKGGGGSGGGGS 71 32   8 512 peptide 126 KKLLKWLKKLL 72 64  32 640 peptide 21 (MAL)-(EG3)-GIGKFLKKAKKFGKAFVKILKK 73  8  64  64 peptide 128 RLONFFRKAKKKIGRGLKKIGQKIKDFLONLVPRTES 74 16   8 128 peptide 23 GGGGSGGGGSGIGKFLKKAKKFGKAFVKILKK 75  8  32  32 Peptide 33 GLRKRLRKFRNKIKEKLKKIGQKIQGLLPKLA 76  8   8  32 peptide 29 GGGGSGGGGSALWKTLLKKVLKAAAK 77 32 128 128 peptide 85 GWKKWFNRAKKVGKTVGGLAVDHYLG 78 64 256 256 peptide 70 GAFGNFLKGVAKKAGLKILSIAQCKLFGTC 79  4   8   8

Structure-activity relationships for exemplary AMPs were examined for ADC construction. Candidate AMPs were selected based, e.g., on killing activity, level of hemolysis, and activity in human serum. The results are shown in Table 6B. Exemplary AMPs, P265, P271, GGG-Octapeptin, P293, P294, P295, P261, and P297 were selected for evaluation as ADCs.

TABLE 6B Structure-Activity Relationships for Exemplary AMPs 50% Hemo- Hemo- hsMIC MIC (mg/ml) lysis lysis (μg/ml) Sample Pae Pae Eco Eco Sau Kpn MLC MLC/ PLC PLC/ Pae hsMIC/ (P = Peptide) 27853 39324 25922 43745 29213 700603 (μg/ml) MIC (μg/ml) MIC 27853 MIC P265 32 16 32 8 >128 >128 128 >4 32 1 >128 >4 P271 16 8 4 4 16 32 >128 >8 64 4 32 2 GGG- 2 2 32 16 >128 >128 >128 >64 >128 >64 2 1 Octapeptin P289 >128 32 128 64 64 >128 >128 ND >128 ND >128 ND P291 >128 >128 >128 >128 >128 >128 >128 ND 32 <0.25 >128 ND P292 >128 >128 >128 >128 >128 >128 128 ND 128 <1 >128 ND P293 8 2 4 4 4 4 128 16 32 4 32 4 P294 64 2 4 2 4 8 >128 >2 >128 >2 64 1 P295 4 4 4 4 16 16 >128 >32 >128 >32 2 0.5 P296 4 2 4 4 16 32 >128 >32 128 32 1 0.25 P261 16 8 4 4 32 128 >128 >8 >128 >8 32 2 P297 4 2 4 2 32 128 >128 >32 >128 >32 8 2 Ceftazadime 1 1 0.25 0.25 4 32 16 16 8 8 1 1 Ciprofloxacin 0.25 0.03 0.015 0.03 0.5 0.25 >1 >4 >1 >4 0.25 1

In Table 6B, MIC was determined in the presence of PBS, hsMIC was determined in the presence of 50% human serum, MLC was determined as the concentration (e.g., minimum concentration) that led to 100% red blood cell lysis; PLC was determined as the concentration (e.g., minimum concentration) that led to 50% red blood cell lysis.

Pae: P. aeruginosa; Eco: E. coli; Sau: S. aureus; Kpn: K. pneumoniae

Example 7: Peptide Stapling to Improve Potency and Stability of Antimicrobial Peptides

This example shows that peptide stapling improved potency and stability of an exemplary α-helical antimicrobial peptide. The process of peptide stapling by chemical crosslinking was illustrated in FIG. 4. The inhibitory activity of the antimicrobial peptide before and after stapling was determined. The MIC for the exemplary peptide is 160 μg/ml, whereas the MIC for the stapled peptide is 10 μg/ml. Exemplary stapling methods are described, e.g., in Alexander et al. J. Am. Chem. Soc., 2013, 135 (16), 5946-5949.

Example 8: Production of Antibody Drug Conjugates Using Sortase-Based Ligation

The sortase ligation forms a native peptide bond between a sortase recognition sequence and a sortase donor sequence. Quantitative addition was achieved of the peptide GGGRGLRRLGRKIAHGVKKYGPTVLRIIRIAG (SEQ ID NO: 80) onto the C-termini of antibody heavy chains containing (GS)₆LPETGGG (SEQ ID NO: 24), and of light chains containing P(G₄S)₂LPETGGSG (SEQ ID NO: 26) using sortase A pentamutant (Chen et al. Proc. Natl. Acad. Sci. USA, 2011, 108 (28): 11399-11404). The sequence of GGG is the sortase donor domain and the sequence of RGLRRLGRKIAHGVKKYGPTVLRIIRIAG (SEQ ID NO: 68) is the antimicrobial peptide domain.

A representative method is described as follows. 1.5 mg/mL antibody in 150 mM NaCl, 50 mM Tris (pH 7.5), 10 mM CaCl₂, 20 mol equivalents of sortase donor peptide per sortase acceptor sequence, 1 mol equivalent of sortase per 75 mol equivalents of sortase acceptor sequence were combined. The reaction was incubated at 25° C. for 20 hours, and extent of conversion was monitored by Q-TOF mass spectrometry. Upon complete conversion of the reaction, as determine by Q-TOF, the reaction mixture was diluted 10-fold in PBS and purified on a Protein A column. The FPLC purified constructs were further characterized by Q-TOF and by gel electrophoresis. The results are shown in FIG. 6.

Sortase ligation was also performed as follows. Peptides containing an N-terminal GGG sortase donor sequence were ligated to the C-termini of the antibody heavy chain containing the sortase A recognition sequence LPETGGG. Antibodies had been buffer exchanged into 150 mM NaCl/50 mM Tris (pH 7.5) prior to ligation. Optimized sortase ligation conditions were performed in 150 mM NaCl/50 mM Tris (pH 7.5) using 20 mol peptide per mol mAb at 1.5 mg/mL mAb (150 kDa), 10 mM CaCl2, 5.8 μg/mL Sortase A (from BPS Bioscience, (21.7 kDa)). After incubation at ambient temperature in the dark for 18 hours, samples were diluted to 10 ml total volume in PBS and purified by FPLC. Conjugation efficiency was determined by Q-TOF mass spectrometry using a reduced antibody prepared by heating a 5 μg sample at 65° C. for 15 min in 10 mM DTT.

Example 9: Evaluation of Selectivity of Antibody Drug Conjugates

An exemplary ADC was evaluated for selectivity for target bacteria using a mixed microbial killing assay. As shown in FIGS. 11A-11D, killing activity of ADC targeting Pseudomonas was preferential for Pseudomonas over E. coli and Klebsiella spp., compared to antibody alone, peptide alone, or a combination of antibody and peptide.

Example 10: Binding to P. aeruginosa Including Multi-Drug Resistant Strains

The binding of an exemplary ADC (comprising mAb001) to P. aeruginosa, including multi-drug resistant strains, was tested. As shown in FIG. 12 and Table 7, the exemplary ADC showed strong binding to P. aeruginosa. The exemplary ADC is highly selected for P. aeruginosa (data not shown). The binding is LPS core specific.

TABLE 7 Binding Avidity to P. aeruginosa (EC50) P. aeruginosa Strain Binding (pM) BAA-2108* 53 BAA-2109* 73 BAA-2110* 68 BAA-2111* 53 BAA-2112* 104 BAA-2113* 58 BAA-2114* 56 33348 73 27316 72 33358 72 27853 113 *Strains are multi-drug resistant

Example 11: Engagement to Bacterial Surface

The binding of an exemplary ADC (comprising mAb001) to bacterial surface was examined. The binding was visualized by electron microscopy using immunogold secondary labeling. As shown in FIG. 13, the exemplary ADC binds to bacterial surface. Enhanced surface binding was observed compared to other targets.

Example 12: Antibody In Vivo Activity: Murine Acute Pneumonia

The in vivo activity of an exemplary anti-LPS antibody molecule (mAb001) was tested in a murine acute pneumonia model.

Mice were supplied by Charles River (Margate UK) and were specific pathogen free. The strain of mice used was ICR (also known as CD1 mice) which is a well characterized outbred murine strain. Mice (male) were 11-15 g on receipt and were allowed to acclimatise for at least 7 days. Mice were rendered neutropenic by immunosuppression with cyclophosphamide at 200 mg/kg 4 days before infection and 150 mg/kg 1 day before infection by intraperitoneal injection. The immunosuppression regime leads to neutropenia starting 24 hours post administration of the first injection which continues throughout the study. Pseudomonas aeruginosa strain ATCC 27853 was used for in vivo studies.

Mice were infected approximately 24 hours after the second dose of immunosuppressive agent by intranasal instillation with P. aeruginosa ATCC 27853 prepared from fresh broth and diluted to an optimal concentration with PBS. For infection, animals were anaesthetized with Ketamine/Xylazine (90 mg/kg Ketamine/9 mg/kg Xylazine) via IP injection delivered at ˜15 mL/kg. Anaesthetized mice were infected with 0.04 mL inoculum by intranasal instillation (20 μL per nostril, 5 min between nostrils) and were kept in an upright position on a string rack for ˜10 minutes post-infection. The inoculum concentration was 6.67×10⁵ CFU/mL (˜2.67×10⁴ CFU/mouse lung). Stock solutions of test articles were prepared in PBS (Dulbecco's Phosphate Buffered Saline). Following reconstitution, all test dosing solutions remained translucent and non-particulate for the duration of the dosing period.

Test articles were dosed once by the intravenous (IV) route at 12 hours before the planned infection time. The comparators tobramycin and polymyxin B were dosed three times a day (TID) by the IV and subcutaneous (SC) routes, respectively, starting at 2 hours post-infection. The dosing volume was 10 mL/kg for all test article doses and comparators.

Each group included 8 neutropenic animals Animals received intranasal inoculation of P. aeruginosa ATCC 27853. The antibody molecule was administered at 5 mg/kg or 45 mg/kg intravenously. Polymyxin B was used as a positive control. The 24-hour bacterial burden in lung was measured. As shown in FIG. 14, the exemplary antibody molecule showed 2-log reduction (CFU/g). The results demonstrated the in vivo efficacy of an LPS core-targeting antibody in a murine acute pneumonia model.

Example 13: Effect of AMP Stapling on Stability and Non-Specific Binding

The effect of stapling on stability and non-specific binding (NSB) was examined using an exemplary antimicrobial peptide. As shown in FIGS. 15A-15B, both T=0 and T=60 min serum measurements show increased amounts of the stapled AMP relative to the unstapled version. This data is quantitative and was generated on an LS/MS. The increase was attributed to reduced NSB with the stapled compound. FIG. 15C illustrates the difference between unoptimized payload and optimized payload. Payloads can be selected based on serum stability. Payloads having reduced non-specific binding and/or enhanced protease stability can be selected.

Serum stability sample generation was performed as follows. Normal Human Serum (NHS) (Sigma S-7023) was thawed, diluted in water, centrifuged at 13000 rpm for 10 minutes and the supernatant was warmed to 37° C. in a water bath. Twenty μl of each test article was placed in a 2.0 ml round bottom microfuge tube. Two ml of diluted NHS was added to each tube and immediately the tubes were vortexed and 200 μl was transferred to a fresh microfuge tube with 40 μl of 15% Trichloroacetic acid (TCA). Assay tubes were placed at 37° C. in a rotating rack between time-points. TCA tubes were placed on ice for 15 minutes and then centrifuged at 13000 rpm for 10 minutes. Supernatant from each tube was collected and frozen at −20° C. for analysis. Samples were harvested and processed at various time-points up to 6 hours. Exemplary methods are also disclosed in Nguyen et al. (2010) PLoS ONE 5(9): e12684.

Example 14: Effect of Anti-LPS Antibody on Endotoxin Signal

A cell-based colorimetric assay was used for the detection and quantification of endotoxin signal LPS. This assay is based on the activation of Toll-like receptor (TLR) 4, the mammalian endotoxin sensor (Beutler et al. Curr Top Microbiol Immunol. 2002; 270:109-20). TLR4 recognizes LPS from Gram-negative bacteria and activates NF-κB. Cells engineered to become sensitive to LPS, such as HEK-Blue™-4 cells (InvivoGen), stably express human TLR4 and an NF-κB-inducible secreted embryonic alkaline phosphatase (SEAP) reporter gene. The presence of LPS can be detected by the HEKBlue™-4 cells leading to the activation of NF-κB. Using QUANTI-Blue™ (InvivoGen), a SEAP detection medium that produces a color signal, NF-kB activation can be detected at 620-655 nm. Since the absorbance is in direct proportion to the amount of endotoxin present, the concentration of endotoxin can be measured from a standard curve obtained using serial dilutions of the HEK-Blue™ Endotoxin Standard (InvivoGen).

As shown in FIG. 16, the endotoxin signal (Pseudomonas-LPS) was completely abolished in the presence of an exemplary anti-LPS antibody molecule, mAb001. Negative control (a C. difficile anti-toxin antibody, CDA1) did not show any effect on the endotoxin signal. 0.5 EU/ml of Pseudomonas-LPS was used in this study.

Example 15: Microbial Killing Activity with Antibody Drug Conjugates

Exemplary ADCs were tested for their microbial killing activity.

The microbial killing assay was performed as follows. Bacterial cells were grown aerobically overnight on agar plates at 37° C. Overnight plates were used to seed 30 ml cultures of growth media in 250 ml vented flasks. Cultures were grown aerobically at 37° C., shaking at 150 rpm. Growth was monitored at A600 nM and bacterial cells were harvested at mid-log growth. Ten ml of culture was pelleted at 4000×G for 10 minutes and washed one time with PBS plus 1% BSA before re-suspending in 2 ml PBS+BSA. The concentrated culture was used to seed 6 ml tubes of PBS plus BSA to an OD giving a concentration of 1×10⁸ cells/ml. Cultures were diluted to 1×10⁴ cells/ml in PBS plus BSA. Test articles were diluted in PBS+1% BSA and 50 μl per concentration tested was loaded into a 96 well polypropylene microtiter plate. Fifty μl of diluted culture was added to all test wells as well as no compound control wells. Plates were shaken and incubated at 37° C., 90 minutes, static. Ten μl from each assay well was plated onto agar plates and incubated at 37° C. overnight. Percent killing was determined by the CFU for test wells compared to the CFU for no compound control wells.

As shown in Table 9, multiple exemplary ADCs showed 50% killing activity against P. aeruginosa stains at a concentration less than 10 μg/ml.

TABLE 9 Microbial Killing Activity of Exemplary ADCs (SEQ (SEQ 50% Killing ID NO: ID NO: Activity 157) 157) (μg/ml) Exemplary Linker- Linker- Val- Pay- Pae Pae Conjugates mAb HC LC ency load 27853 39324 1 mAb001 (GS)15 (GS)15 Tetra- P271 25 6.3 2 mAb001 (GS)15 (GS)15 Tetra- P293 25 12.5 3 mAb001 (GS)15 (GS)15 Tetra- P294 6.3 3.1 4 mAb001 (GS)15 (GS)15 Tetra- P295 6.3 0.8 5 mAb001 (GS)15 (GS)15 Tetra- P297 1.6 0.4

Example 16: Microbial Killing Activity Against Multiple Drug Resistant Strains

Exemplary compounds were tested for their microbial killing activity against multiple drug resistant P. aeruginosa strain.

The microbial killing assay was performed as described in Example 15. As shown in Table 10, exemplary ADCs showed microbial killing activity against multiple drug resistant (MDR) strains of P. aeruginosa.

TABLE 10 Microbial Killing Activity of Exemplary ADCs against MDR Strains Linker- Linker- HC LC (SEQ (SEQ 50% Killing ID ID Activity (μg/ml) Com- NO: NO: Val- Pay- Pae BAA- BAA- BAA- pounds mAb 157) 157) ency load 27853 2110 2114 2108 mAb001 mAb001 >100 >100 >100 >100 P295 — P295 0.3 0.6 0.14 0.6 P297 — P297 0.04 0.28 0.07 0.28 mAb001- mAb001 (GS)15 (GS)15 Tetra- P295 12.5 12.5 6.3 6.3 Conjugate1 mAb001- mAb001 (GS)15 (GS)15 Tetra- P297 3.1 6.3 3.1 3.1 Conjugate2

Example 17: Selective Killing of Bacteria by Antibody Drug Conjugates

Exemplary compounds were tested for their killing selectivity against different bacteria. The Pseudomonas strains used in the assay were P. aeruginosa 27853 (ATCC), P. aeruginosa 39324 (ATCC), P. aeruginosa PA01 (UMD). The E. coli strains used in the assay were E. coli 25922 (ATCC) and E. coli 43745 (J5) (ATCC). The Klebsiella strain used in the assay was K. pneumoniae 700603 (ATCC). Bacterial cells were grown on agar plates from frozen stocks. All bacterial strains were grown on blood agar plates (TSA+5% Sheep blood). All plates were grown at 37° C. overnight.

Overnight plates were used to establish 0.5 McFarland Cultures in 10 ml Pyrex tubes in 6 ml 1×PBS. The concentrated cultures (approximately 1×10⁸ cells/ml) were diluted 2×1:100 in PBS (0.1 mls culture in 9.9 ml PBS) to a concentration of approximately 1×10⁴ cells/ml. Ten μl of each of the diluted cultures were plated onto blood agar plates (BAPs) using sterile “hockey stick” spreaders to determine the initial concentration, check for purity, and establish strain morphology. One ml of each diluted culture was then mixed with enough PBS to bring the volume to 10 ml. This mixed culture had approximately 1×10³ cells of each bacterial strain per ml. 25 μl of this mixed culture was plated onto a BAP to establish the t=0 CFUs/ml for each strain.

Antibodies, anti-microbial peptides (AMPs), and antibody drug conjugates (ADCs) to be tested were diluted in 1×PBS. Dilutions were either 2 fold or four-fold and 3 or 4 concentrations of each compound were tested. For antibodies and conjugates, typical final assay concentrations for the assay were 100, 25, 6.25, and 1.56 μg/ml although higher, lower, and broader dilution ranges had been used. Antimicrobial peptides were tested at molar equivalents to the amount of peptide that was found in a corresponding conjugate (most commonly 4.4, 1.1, 0.28, and 0.07 μg/ml). All compounds were at a final volume of 200 μl in a 2.0 ml round bottom Eppendorf tube. A no compound control tube was also included. 200 μl of the mixed bacterial culture above was added to all assay tubes. The tubes were votexed and 50 μl of each assay tube were plated on separate BAPs. The assay tubes were then placed at 37° C. in a rotating rack. The plating procedure was repeated at one or two hour intervals over four hours with the tubes rotating at 37° C. between timepoints. All plates were put at 37° C. overnight.

Total plates required=(number of assay tubes×number of time-points)+t=0 controls (3-4)

The following day, all plates were counted for CFU of each bacterial strain.

For each compound, percent killing (% CFU reduction compared to a no compound control) was calculated for each strain at each timepoint. Data was tabled and graphed as % killing vs. time.

As shown in FIG. 17, the exemplary ADC selectively killed Pseudomonas and rapid killing (within an hour) was achieved.

Example 18: Antibody Drug Conjugate In Vivo Activity: Murine Acute Pneumonia

The in vivo activity of an exemplary ADC (mAb001-conj2) was tested in a murine acute pneumonia model.

Mice were supplied by Charles River (Margate UK) and were specific pathogen free. The strain of mice used was ICR (also known as CD1 mice) which is a well characterized outbred murine strain. Mice (male) were 11-15 g on receipt and were allowed to acclimatise for at least 7 days. Mice were rendered neutropenic by immunosuppression with cyclophosphamide at 200 mg/kg 4 days before infection and 150 mg/kg 1 day before infection by intraperitoneal injection. The immunosuppression regime leads to neutropenia starting 24 hours post administration of the first injection which continues throughout the study. Pseudomonas aeruginosa strain ATCC 27853 was used for in vivo studies.

Mice were infected approximately 24 hours after the second dose of immunosuppressive agent by intranasal instillation with P. aeruginosa ATCC 27853 prepared from fresh broth and diluted to an optimal concentration with PBS. For infection, animals were anaesthetized with Ketamine/Xylazine (90 mg/kg Ketamine/9 mg/kg Xylazine) via IP injection delivered at ˜15 mL/kg. Anaesthetized mice were infected with 0.04 mL inoculum by intranasal instillation (20 μL per nostril, 5 min between nostrils) and were kept in an upright position on a string rack for ˜10 minutes post-infection. The inoculum concentration was 6.67×10⁵ CFU/mL (˜2.67×10⁴ CFU/mouse lung). Stock solutions of test articles were prepared in PBS (Dulbecco's Phosphate Buffered Saline). Following reconstitution, all test dosing solutions remained translucent and non-particulate for the duration of the dosing period.

For intravenous dosing, test articles were dosed once by the IV route at 12 hours before the planned infection time. The comparators tobramycin and polymyxin B were dosed TID by the IV and SC route respectively starting at 2 hours post-infection. The dosing volume was 10 mL/kg for all test article doses and comparators.

For intranasal (IN) dosing, test articles and comparator Tobramycin were dosed once intranasally (IN) post infection (15 min for Co-administration; 2 h for therapeutic). Animals were anaesthetized with isoflurane. Anaesthetized mice were dosed with 0.04 mL inoculum by intranasal instillation (20 μL per nostril, 5 min between nostrils) and were kept in an upright position on a string rack for ˜10 minutes post-dosing

2 Hours post infection, pre-treatment control animals were humanely euthanized using a pentobarbitone overdose. Clinical condition of the remaining animals was monitored and animals that succumbed to the disease were humanely euthanized. The study was terminated ˜23 h post infection when most of the vehicle mice were at the ethically agreed endpoint.

At 23 hours post infection, the clinical condition of all remaining animals was assessed and they were humanely euthanized by pentobarbitone overdose Animal weights were determined before the lungs were removed and weighed. Lung samples were homogenized in ice cold sterile phosphate buffered saline using a Precellys bead beater; the homogenates were quantitatively cultured onto Pseudomonas selective agar and incubated at 37° C. for 16 to 24 hours before colonies were counted. Bacterial burden in the lung was reported on a CFU/g basis. The murine model is also described in Secher et al. PLoS One. 2013; 8(9):e73396.

In the Co-administration study arm, each group included 6 neutropenic animals Animals received co-administration of ADC or antibody molecule with bacteria. The ADC (mAb001-Conj2) was administered at 10 μg or 200 μg (mAb001-Conj2=mAb001-P297 conjugate), and mAb001 was administered at 200 μg. The 24-hour bacterial burden in lung was measured. As shown in FIG. 18A, the exemplary ADC showed rapid activity when co-administered with bacteria. The activity was comparable to Tobramycin.

In the intranasal (IN) study arm, each group included 6 neutropenic animals Animals received intranasal inoculation of P. aeruginosa ATCC 27853. The ADC (mAb001-Conj2) was administered at 10 μg or 200 μg 2 hours post inoculation. The 24-hour bacterial burden in lung was measured. As shown in FIG. 18B, the exemplary ADC showed about 2 log₁₀ reduction in CFU/g.

Example 19: Bioavailability of Antibody Drug Conjugate

The bioavailability of an exemplary ADC was studied in a mouse model. C57/BL6 mice, 6 week old, male, were used. Each group included four mice. mAb001 and mAb001-P297 were dosed at 5 mg/kg by intravenous injection. Data were collected 24 hours and 120 hours post-administration. Human IgG was quantified by ELISA.

As shown in FIG. 19, the bioavailability of the mAb001 conjugate was comparable to mAb001.

Example 20: Study of Phosphorylated Glycans in Core LPS

Phosphorylated glycans represent a key, conserved motif in all P. aeruginosa strains. LPS was prepared from PAC557 strain. NMR analysis revealed multiple glycoforms, variable 0-acetylation in outer core, and hyper-phosphorylated L, D-mannoheptose units.

Example 21: Effect of D-Amino Acids on Peptide Serum Stability

The effect of D-amino acids on the stability of antimicrobial peptide in human serum was studied. An exemplary antimicrobial peptide, P297, was used in this study. (D)-P297 contains all D-amino acids and (L)-P297 contains all L-amino acids. The percentages of remaining intact peptides were measured either in the absence of human serum, or in the presence of 2%, 5%, or 10% human serum, over a period of 60 minutes. As shown in FIGS. 20-21, (L)-P297 degraded rapidly (and completely under certain testing conditions), and (D)-P297 was considerably more stable than (L)-P297.

INCORPORATION BY REFERENCE

All publications, patents, and accession numbers mentioned herein are hereby incorporated by reference in their entirety as if each individual publication or patent was specifically and individually indicated to be incorporated by reference.

EQUIVALENTS

While specific embodiments of the compositions and methods herein have been discussed, the above specification is illustrative and not restrictive. Many variations of the invention will become apparent to those skilled in the art upon review of this specification and the claims below. The full scope of the invention should be determined by reference to the claims, along with their full scope of equivalents, and the specification, along with such variations. 

1. An antibody molecule-drug conjugate (ADC) comprising: a) an antibody molecule that binds to lipopolysaccharide (LPS); and b) an antimicrobial peptide.
 2. The ADC of claim 1, wherein: (i) the ADC or antibody molecule comprises a heavy chain variable region (VH), wherein the VH comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and wherein the VH comprises: (a) an HCDR1 comprising the amino acid sequence of SEQ ID NO: 108; an HCDR2 comprising the amino acid sequence of any of SEQ ID NOS: 109, 145, or 146; and an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107, or (b) an HCDR1 comprising the amino acid sequence of SEQ ID NO: 105; an HCDR2 comprising the amino acid sequence of SEQ ID NO: 106; and an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107; or (ii) the ADC or antibody molecule comprises a light chain variable region (VL), wherein VL comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), and wherein the VL comprises: an LCDR1 comprising the amino acid sequence of any of SEQ ID NOS: 110, 138, 140, or 144; an LCDR2 comprising the amino acid sequence of any of SEQ ID NOS: 111, 139, 141, 142, or 143; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO:
 112. 3. (canceled)
 4. The ADC of claim 1, wherein the ADC or antibody molecule comprises a VH and a VL, wherein the VH comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the VL comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), and wherein the ADC or antibody molecule comprises: (a) an HCDR1 comprising the amino acid sequence of SEQ ID NO: 108; an HCDR2 comprising the amino acid sequence of any of SEQ ID NOS: 109, 145, or 146; an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107; an LCDR1 comprising the amino acid sequence of any of SEQ ID NOS: 110, 138, 140, or 144; an LCDR2 comprising the amino acid sequence of any of SEQ ID NOS: 111, 139, 141, 142, or 143; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO: 112, or (b) an HCDR1 comprising the amino acid sequence of SEQ ID NO: 105; an HCDR2 comprising the amino acid sequence of SEQ ID NO: 106; an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107; an LCDR1 comprising the amino acid sequence of any of SEQ ID NOS: 110, 138, 140, or 144; an LCDR2 comprising the amino acid sequence of any of SEQ ID NOS: 111, 139, 141, 142, or 143; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO:
 112. 5. The ADC of claim 1, wherein the ADC or antibody molecule comprises a VH and a VL, wherein the VH comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the VL comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), wherein the VH comprises: (a)(i) an HCDR1 comprising the amino acid sequence of SEQ ID NO: 108; an HCDR2 comprising the amino acid sequence of SEQ ID NO: 109; and an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107, (a)(ii) an HCDR1 comprising the amino acid sequence of SEQ ID NO: 108; an HCDR2 comprising the amino acid sequence of SEQ ID NO: 145; and an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107, (a)(iii) an HCDR1 comprising the amino acid sequence of SEQ ID NO: 108; an HCDR2 comprising the amino acid sequence of SEQ ID NO: 146; and an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107, or (b) an HCDR1 comprising the amino acid sequence of SEQ ID NO: 105; an HCDR2 comprising the amino acid sequence of SEQ ID NO: 106; and an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107, and/or wherein the VL comprises: (i) an LCDR1 comprising the amino acid sequence of SEQ ID NO: 110; an LCDR2 comprising the amino acid sequence of SEQ ID NO: 111; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO: 112, (ii) an LCDR1 comprising the amino acid sequence of SEQ ID NO: 138; an LCDR2 comprising the amino acid sequence of SEQ ID NO: 139; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO: 112, (iii) an LCDR1 comprising the amino acid sequence of SEQ ID NO: 138; an LCDR2 comprising the amino acid sequence of SEQ ID NO: 111; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO: 112, (iv) an LCDR1 comprising the amino acid sequence of SEQ ID NO: 140; an LCDR2 comprising the amino acid sequence of SEQ ID NO: 111; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO: 112, (v) an LCDR1 comprising the amino acid sequence of SEQ ID NO: 110; an LCDR2 comprising the amino acid sequence of SEQ ID NO: 141; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO: 112, (vi) an LCDR1 comprising the amino acid sequence of SEQ ID NO: 110; an LCDR2 comprising the amino acid sequence of SEQ ID NO: 142; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO: 112, (vii) an LCDR1 comprising the amino acid sequence of SEQ ID NO: 138; an LCDR2 comprising the amino acid sequence of SEQ ID NO: 143; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO: 112, (viii) an LCDR1 comprising the amino acid sequence of SEQ ID NO: 138; an LCDR2 comprising the amino acid sequence of SEQ ID NO: 139; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO: 112, (ix) an LCDR1 comprising the amino acid sequence of SEQ ID NO: 144; an LCDR2 comprising the amino acid sequence of SEQ ID NO: 142; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO: 112, or (x) an LCDR1 comprising the amino acid sequence of SEQ ID NO: 138; an LCDR2 comprising the amino acid sequence of SEQ ID NO: 142; and an LCDR3 comprising the amino acid sequence of any of SEQ ID NO:
 112. 6. The ADC of claim 1, wherein the ADC or antibody molecule comprises a VH and a VL, wherein the VH comprises the amino acid sequence of any of SEQ ID NOS: 103 or 115-118, or comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of any of SEQ ID NOS: 103 or 115-118, and/or wherein the VL comprises the amino acid sequence of any of SEQ ID NOS: 104 or 119-137, or comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of any of SEQ ID NOS: 104 or 119-137.
 7. The ADC of claim 1, wherein: (i) the antibody molecule is a monoclonal antibody molecule, a humanized antibody molecule, an isolated antibody molecule, or a synthetic antibody molecule; (ii) the ADC or antibody molecule comprises two VHs and two VLs, or comprises a Fab, a F(ab′)2, an Fv, or a single chain Fv fragment (scFv); (iii) the ADC or antibody molecule further comprises a heavy chain constant region of an IgG1, IgG2, IgG3, or IgG4, and/or a light chain constant region of a kappa or lambda chain; or (iv) the ADC or antibody molecule binds to a core pentasaccharide region of the LPS, wherein the core pentasaccharide region comprises one or more Kdo residues and one or more Hep residues. 8-10. (canceled)
 11. The ADC of claim 1, wherein the ADC or antibody molecule binds to: (a) one or more Gram-negative bacteria, or one or more antibiotic-resistant or multidrug-resistant (MDR) bacteria. (b) a species of Enterobacteriaceae chosen from a species of Klebsiella, Enterobacter, Shigella, Escherichia, Salmonella, Yersinia, or Citrobacter, a species of Pseudomonas, a species of Acinetobacter, or any combination thereof; or (c) Klebsiella pneumonia, Enterobacter cancerogenous, Enterobacter cloacae, Enterobacter hormaechei, Enterobacter asburiae, Shigella boydii, Shigella dysenteriae, Shigella flexneri, Shigella sonnei, Escherichia coli, Escherichia fergusonii, Salmonella choleraesuis, Salmonella enteritidis, Salmonella virchow, Salmonella paratyphi B, Salmonella typhimurium, Salmonella paratyphi A, Salmonella typhi, Salmonella bongori, Citrobacter sedlakii, Citrobacter braakii, Citrobacter werkmanii, Citrobacter freundii, Citrobacter youngae, Citrobacter amalonaticus, Yersinia enterocolitica, Yersinia frederiksenii, Yersinia pestis, Yersinia pseudotuberculosis, Pseudomonas aeruginosa, Acinetobacter baumannii, or any combination thereof.
 12. The ADC of claim 1, wherein: (i) the ADC or antibody molecule binds to LPS with a K_(D) that is less than about 10 nM as measured by an ELISA method, and/or has an opsonophagocytic activity against a bacterium; (ii) the antibody molecule is fused to the antimicrobial peptide; (iii) the antibody molecule comprises: (a) a VH fused to the antimicrobial peptide, wherein the VH is N-terminal or C-terminal to the antimicrobial peptide; (b) a VL fused to the antimicrobial peptide, wherein the VL is N-terminal or C-terminal to the antimicrobial peptide; or (c) both (a) and (b); optionally wherein the C-terminus of the VH or VL is fused to the N-terminus of the antimicrobial peptide indirectly via a constant region, a linker, or both; (iv) the antibody molecule is fused to the antimicrobial peptide by a sortase; (v) the ADC or antimicrobial peptide comprises the amino acid sequence of any of SEQ ID NOS: 67-80, 94-102, 147-156, 158-159, or 163-164, or comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, or 5 amino acid residues from, or has at least 80, 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of any of SEQ ID NOS: 67-80, 94-102, 147-156, 158-159, or 163-164; (vi) the antimicrobial peptide comprises 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, or more D-amino acids, or at least 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%, or 100%, of the amino acid residues in the antimicrobial peptide are D-amino acids; (vii) the antimicrobial peptide comprises a first cysteine residue and a second cysteine residue, and wherein the first cysteine residue is cross-linked to the second cysteine residue; (viii) the ADC comprises at least two, three, or four antimicrobial peptides; or comprising at least two, three, or four identical, or substantially identical, antimicrobial peptides, each of which is fused to a VH or VL indirectly via a constant region, a linker, or both; (ix) the antimicrobial peptide has an antimicrobial activity against 2, 3, or all of the following: (a) at least one species of Enterobacteriaceae chosen from one or more species of Klebsiella, Enterobacter, Shigella, Escherichia, Salmonella, Yersinia, or Citrobacter, (b) at least one species of Pseudomonas; or (c) at least one species of Acinetobacter; or (x) the antimicrobial peptide has a PLC to MIC ratio for a Gram-negative bacteria which is greater than 4:1, wherein the PLC is determined by a red blood cell hemolysis assay. 13-20. (canceled)
 21. The ADC of claim 1, wherein (ii) the ADC has (a) a minimum inhibitory concentration (MIC) for a Gram-negative bacterium that is at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 fold lower on a molar basis than the MIC of the antimicrobial peptide alone; (b) a minimum bactericidal concentration (MBC) for a Gram-negative bacterium that is at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 fold lower on a molar basis than the MBC of the antimicrobial peptide alone; or (c) both (a) and (b); (ii) the ADC has (d) a MIC for a Gram-negative bacterium that is at least 2, 5, 10, 20, 50, 100, 200, 500, or 1000 fold lower on a molar basis than a MIC for a Gram-positive bacterium; (e) an MBC for a Gram-negative bacterium that is at least 2, 5, 10, 20, 50, 100, 200, 500, or 1000 fold lower on a molar basis than an MBC for a Gram-positive bacterium; or (f) both (d) and (e); or (iii) the antimicrobial peptide has: (a) a MIC of less than 100, 90, 80, 70, 60, 50, 40, 30, 20, 10, or 5 μg/ml, for Escherichia coli, Pseudomonas aeruginosa, or both; (b) an MBC of less than 100, 90, 80, 70, 60, 50, 40, 30, 20, 10, or 5 μg/ml, for Escherichia coli, Pseudomonas aeruginosa, or both; or (c) both (a) and (b). 22-25. (canceled)
 26. A pharmaceutical composition comprising the ADC of claim 1 and a pharmaceutically acceptable carrier.
 27. A method of treating or preventing a bacterial infection, comprising administering to a subject in need thereof the ADC of claim 1, in an amount effective to treat or prevent the bacterial infection.
 28. The method of claim 27, wherein: (i) the bacterial infection is associated with a Gram-negative bacterium, or is a nosocomial infection or a hospital-acquired infection; (ii) the ADC is administered at a dose of 1-10 mg/kg, and/or is administered intravenously, subcutaneously, or intranasally or by inhalation; (iii) the ADC is administered prior to or after onset of a symptom associated with the bacterial infection; (iv) the method further comprises administering to the subject a second antimicrobial agent or therapy. 29-30. (canceled)
 31. The method of claim 27, wherein the subject: (a) has one or more of: pneumonia, a urinary tract infection (UTI), septicemia, meningitis, diarrhea, a soft tissue infection, a skin infection, bacteremia, a respiratory system infection, endocarditis, an intra-abdominal infection, septic arthritis, osteomyelitis, a CNS infection, an ophthalmic infection, cholecystitis, cholangitis, meningitis, typhoid fever, food poisoning, gastroenteritis, enteric fever, shigellosis, a blood stream infection, intra-abdominal sepsis, a brain abscess, meningitis, sepsis, a joint infection, a bone infection, a gastrointestinal infection, or a wound infection. (b) is a human or an animal; (c) is an immunocompromised patient or a health professional; (d) has, or is at risk of having, an HIV infection or AIDS, a cancer, a solid organ transplantation, a stem cell transplantation, a sickle cell disease or asplenia, a congenital immune deficiency, a chronic inflammatory condition, a cochlear implant, malnutrition, or a cerebrospinal fluid leak; or (e) is 18 years old or younger, 15 years old or younger, 12 years old or younger, 9 years old or younger, or 6 years old or younger, or is at least 60 years old, at least 65 years old, at least 70 years old, at least 75 years old, or at least 80 years old.
 32. (canceled)
 33. The method of claim 28, wherein the second antimicrobial agent or therapy comprises an antibiotic or a phage therapy, wherein the antibiotic is chosen from: (a) an aminoglycoside, an ansamycin, a carbacephem, a carbapenem, a cephalosporin, a glycopeptide, a lincosamide, a lipopeptide, a macrolide, a monobactam, a nitrofuran, an oxazolidinone, a penicillin, a penicillin combination, a polypeptide, a quinolone or fluoroquinolone, a sulfonamide, a tetracycline, or a drug against mycobacteria; or (b) amikacin, gentamicin, kanamycin, neomycin, netilmicin, tobramycin, paromomycin, streptomycin, spectinomycin, geldanamycin, herbimycin, or rifaximin, loracarbef, ertapenem, doripenem, imipenem/cilastatin, meropenem, cefadroxil, cefazolin, cefalotin, cefalothin, cephalexin, cefaclor, cefamandole, cefoxitin, cefprozil, cefuroxime, cefixime, cefdinir, cefditoren, cefoperazone, cefotaxime, cefpodoxime, ceftazidime, ceftibuten, ceftizoxime, ceftriaxone, cefepime, ceftaroline fosamil, ceftobiprole, teicoplanin, vancomycin, telavancin, dalbavancin, oritavancin, clindamycin, lincomycin, daptomycin, azithromycin, clarithromycin, dirithromycin, erythromycin, roxithromycin, troleandomycin, telithromycin, spiramycin, aztreonam, furazolidone, nitrofurantoin, linezolid, posizolid, radezolid, torezolid, amoxicillin, ampicillin, azlocillin, carbenicillin, cloxacillin, dicloxacillin, flucloxacillin, mezlocillin, methicillin, nafcillin, oxacillin, penicillin g, penicillin v, piperacillin, penicillin g, temocillin, ticarcillin, amoxicillin/clavulanate, ampicillin/sulbactam, piperacillin/tazobactam, ticarcillin/clavulanate, bacitracin, colistin, polymyxin b, ciprofloxacin, enoxacin, gatifloxacin, gemifloxacin, levofloxacin, lomefloxacin, moxifloxacin, nalidixic acid, norfloxacin, ofloxacin, trovafloxacin, grepafloxacin, sparfloxacin, temafloxacin, mafenide, sulfacetamide, sulfadiazine, silver sulfadiazine, sulfadimethoxine, sulfamethizole, sulfamethoxazole, sulfanilimide, sulfasalazine, sulfisoxazole, trimethoprim-sulfamethoxazole (co-trimoxazole), sulfonamidochrysoidine, demeclocycline, doxycycline, minocycline, oxytetracycline, tetracycline, clofazimine, dapsone, capreomycin, cycloserine, ethambutol, ethionamide, isoniazid, pyrazinamide, rifampin, rifabutin, rifapentine, streptomycin, arsphenamine, chloramphenicol, fosfomycin, fusidic acid, metronidazole, mupirocin, platensimycin, quinupristin/dalfopristin, thiamphenicol, tigecycline, tinidazole, or trimethoprim; and/or wherein the second antimicrobial agent or therapy is administered before the ADC is administered, concurrently with the administration of the ADC, or after the ADC is administered.
 34. (canceled)
 35. A method of inhibiting or reducing a bacterial infection, comprising contacting a cell the ADC of claim 1 in an amount effective to inhibit or reduce the bacterial infection.
 36. A kit comprising: the ADC of claim 1 and instructions for use of the ADC.
 37. A container comprising the ADC of claim
 1. 38. A nucleic acid molecule encoding the ADC of claim
 1. 39. A vector comprising the nucleic acid molecule of claim
 38. 40. A cell comprising the nucleic acid molecule of
 38. 41. A method of producing an ADC, the method comprising culturing the cell of claim 40 under conditions that allow production of an ADC, thereby producing the ADC.
 42. A method of producing an ADC, the method comprising contacting an antibody molecule that binds to LPS with a peptide comprising an antimicrobial peptide, and optionally, a sortase donor sequence, in the presence of a sortase, under conditions that allow a sortase-mediated reaction to occur, thereby producing the ADC.
 43. An antibody molecule that binds to LPS, wherein: (i) the antibody molecule comprises a VH and a VL, wherein the VH comprises three heavy chain complementarity determining regions (HCDR1, HCDR2, and HCDR3), and the VL comprises three light chain complementarity determining regions (LCDR1, LCDR2, and LCDR3), and wherein the ADC or antibody molecule comprises: (a) an HCDR1 comprising the amino acid sequence of SEQ ID NO: 108; an HCDR2 comprising the amino acid sequence of any of SEQ ID NOS: 109, 145, or 146; an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107; an LCDR1 comprising the amino acid sequence of any of SEQ ID NOS: 110, 138, 140, or 144; an LCDR2 comprising the amino acid sequence of any of SEQ ID NOS: 111, 139, 141, 142, or 143; and an LCDR3 comprising the amino acid sequence of SEQ ID NO: 112, or (b) an HCDR1 comprising the amino acid sequence of SEQ ID NO: 105; an HCDR2 comprising the amino acid sequence of SEQ ID NO: 106; an HCDR3 comprising the amino acid sequence of SEQ ID NO: 107; an LCDR1 comprising the amino acid sequence of any of SEQ ID NOS: 110, 138, 140, or 144; an LCDR2 comprising the amino acid sequence of any of SEQ ID NOS: 111, 139, 141, 142, or 143; and an LCDR3 comprising the amino acid sequence of SEQ ID NO: 112; or (ii) the VH comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of any of SEQ ID NOS: 103 or 115-118, and wherein the VL comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acid residues from, or has at least 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of any of SEQ ID NOS: 104 or 119-137.
 44. (canceled)
 45. An antimicrobial peptide that comprises an amino acid sequence that differs by no more than 1, 2, 3, 4, or 5 amino acid residues from, or has at least 80, 85, 90, 95, 96, 97, 98, 99, or 100% homology with, the amino acid sequence of any of SEQ ID NOS: 67-80, 94-102, 147-156, 158-159, or 163-164.
 46. A nucleic acid molecule encoding the antibody molecule of claim
 43. 47. A nucleic acid molecule encoding the antimicrobial peptide of claim
 45. 48. An antibody molecule that: (i) binds to the same epitope, or substantially the same epitope, or (ii) competes for binding with the antibody molecule of claim
 43. 49. (canceled) 